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Copy pathffmpeg_colorkey.cpp
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ffmpeg_colorkey.cpp
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#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 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
std::vector<AVFrame*> output_avstream_video_frame; // ARGB
AVFrame* output_avstream_video_encode_frame = NULL; // 4:2:2 or 4:2:0
size_t output_avstream_video_frame_delay = 1;
size_t output_avstream_video_frame_index = 0;
struct SwsContext* output_avstream_video_resampler = NULL;
class InputFile {
public:
InputFile() : threshhold(0), invert(false), noisekey(0), color(RGBTRIPLET(0,0,0)/*BLACK*/), xdivr(1), fade(0) {
noisekey = 0;
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;
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");
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;
int threshhold;
unsigned int fade;
unsigned int xdivr;
bool invert;
bool eof;
bool eof_stream;
bool got_audio;
bool got_video;
public:
unsigned int noisekey;
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;
}
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");
fprintf(stderr," -color <0xRRGGBB> Color to key against 0xRRGGBB hexadecimal\n");
fprintf(stderr," -threshhold <n> Color key threshhold\n");
fprintf(stderr," -inv <n> If set, invert key\n");
fprintf(stderr," -noise <n> If set, keyed out sections still pass through by random\n");
fprintf(stderr," -width <w> Width in pixels\n");
fprintf(stderr," -xd <x> Check color key every X pixels (i.e. older equipment)\n");
fprintf(stderr," -d <n> Video delay buffer (n frames)\n");
fprintf(stderr," -f <n> Fade buffer contents (n=0...256)\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,"f")) {
a = argv[i++];
if (a == NULL) return 1;
current_input_file().fade = (unsigned int)strtoul(a,NULL,0);
}
else if (!strcmp(a,"d")) {
a = argv[i++];
if (a == NULL) return 1;
output_avstream_video_frame_delay = (unsigned int)strtoul(a,NULL,0);
if (output_avstream_video_frame_delay == 0 || output_avstream_video_frame_delay > 256) {
fprintf(stderr,"Invalid delay\n");
return 1;
}
}
else if (!strcmp(a,"xd")) {
a = argv[i++];
if (a == NULL) return 1;
current_input_file().xdivr = (unsigned int)strtoul(a,NULL,0);
}
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,"noise")) {
a = argv[i++];
if (a == NULL) return 1;
current_input_file().noisekey = (int)strtoul(a,NULL,0);
}
else if (!strcmp(a,"inv")) {
a = argv[i++];
if (a == NULL) return 1;
current_input_file().invert = (int)strtoul(a,NULL,0) > 0;
}
else if (!strcmp(a,"threshhold")) {
a = argv[i++];
if (a == NULL) return 1;
current_input_file().threshhold = (int)strtoul(a,NULL,0);
}
else if (!strcmp(a,"color")) {
a = argv[i++];
if (a == NULL) return 1;
current_input_file().color = (int)strtoul(a,NULL,0);
}
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,"tvstd")) {
a = argv[i++];
if (!strcmp(a,"pal")) {
preset_PAL();
}
else if (!strcmp(a,"ntsc")) {
preset_NTSC();
}
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);
}
// This code assumes ARGB and the frame match resolution/
void composite_layer(AVFrame *dstframe,AVFrame *srcframe,InputFile &inputfile) {
uint32_t *dscan,*sscan;
unsigned int x,y,xdivc;
int dR,dG,dB,d;
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
if (dstframe->width != srcframe->width) return;
if (dstframe->height != srcframe->height) return;
for (y=0;y < dstframe->height;y++) {
sscan = (uint32_t*)(srcframe->data[0] + (srcframe->linesize[0] * y));
dscan = (uint32_t*)(dstframe->data[0] + (dstframe->linesize[0] * y));
xdivc = 0;
for (x=0;x < dstframe->width;x++,dscan++,sscan++) {
// if the source pixel is within the key threshhold, then do not copy the pixel.
// else, copy the pixel.
// very crude color keying, by design. it looks very "retro".
// run the source file through the composite video simulator first and it will look like 1980's green-screen compositing.
if (xdivc == 0) {
dR = (*sscan >> 16UL) & 0xFF; dR -= (inputfile.color >> 16UL) & 0xFF;
dG = (*sscan >> 8UL) & 0xFF; dG -= (inputfile.color >> 8UL) & 0xFF;
dB = (*sscan >> 0UL) & 0xFF; dB -= (inputfile.color >> 0UL) & 0xFF;
d = abs(dR) + abs(dG) + abs(dB);
}
if (inputfile.noisekey > 0) {
unsigned int x = (unsigned int)rand() * (unsigned int)rand() * (unsigned int)rand();
x %= 20001;
if (x < inputfile.noisekey) d = 0xFFFF;
}
if (inputfile.fade != 0) {
unsigned int r,g,b;
r = (((*dscan >> 16UL) & 0xFF) * (256 - inputfile.fade)) >> 8;
g = (((*dscan >> 8UL) & 0xFF) * (256 - inputfile.fade)) >> 8;
b = (((*dscan >> 0UL) & 0xFF) * (256 - inputfile.fade)) >> 8;
*dscan = (r << 16) + (g << 8) + b;
}
if (inputfile.invert) {
if (d < inputfile.threshhold) *dscan = *sscan;
}
else {
if (d >= inputfile.threshhold) *dscan = *sscan;
}
if ((++xdivc) >= inputfile.xdivr) xdivc = 0;
}
}
}
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;
}
{
output_avstream_audio = avformat_new_stream(output_avfmt, NULL);
if (output_avstream_audio == NULL) {
fprintf(stderr,"Unable to create output audio stream\n");
return 1;
}
output_avstream_audio_codec_context = output_avstream_audio->codec;
if (output_avstream_audio_codec_context == NULL) {
fprintf(stderr,"Output stream audio no codec context?\n");
return 1;
}
if (output_audio_channels == 2)
output_avstream_audio_codec_context->channel_layout = AV_CH_LAYOUT_STEREO;
else
output_avstream_audio_codec_context->channel_layout = AV_CH_LAYOUT_MONO;
output_avstream_audio_codec_context->sample_rate = output_audio_rate;
output_avstream_audio_codec_context->channels = output_audio_channels;
output_avstream_audio_codec_context->sample_fmt = AV_SAMPLE_FMT_S16;
output_avstream_audio_codec_context->time_base = (AVRational){1, output_audio_rate};
output_avstream_audio->time_base = output_avstream_audio_codec_context->time_base;
if (output_avfmt->oformat->flags & AVFMT_GLOBALHEADER)
output_avstream_audio_codec_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
if (avcodec_open2(output_avstream_audio_codec_context,avcodec_find_encoder(AV_CODEC_ID_PCM_S16LE),NULL) < 0) {
fprintf(stderr,"Output stream cannot open codec\n");
return 1;
}
}
{
output_avstream_video = avformat_new_stream(output_avfmt, NULL);
if (output_avstream_video == NULL) {
fprintf(stderr,"Unable to create output video stream\n");
return 1;
}
output_avstream_video_codec_context = output_avstream_video->codec;
if (output_avstream_video_codec_context == NULL) {
fprintf(stderr,"Output stream video no codec context?\n");
return 1;
}
// FIXME: How do I get FFMPEG to write raw YUV 4:2:2?
avcodec_get_context_defaults3(output_avstream_video_codec_context,avcodec_find_encoder(AV_CODEC_ID_H264));
output_avstream_video_codec_context->width = output_width;
output_avstream_video_codec_context->height = output_height;
output_avstream_video_codec_context->sample_aspect_ratio = (AVRational){output_height*4, output_width*3};
output_avstream_video_codec_context->pix_fmt = use_422_colorspace ? AV_PIX_FMT_YUV422P : AV_PIX_FMT_YUV420P;
output_avstream_video_codec_context->gop_size = 15;
output_avstream_video_codec_context->max_b_frames = 0;
output_avstream_video_codec_context->time_base = (AVRational){output_field_rate.den, output_field_rate.num};
output_avstream_video->time_base = output_avstream_video_codec_context->time_base;
if (output_avfmt->oformat->flags & AVFMT_GLOBALHEADER)
output_avstream_video_codec_context->flags |= AV_CODEC_FLAG_GLOBAL_HEADER;
if (avcodec_open2(output_avstream_video_codec_context,avcodec_find_encoder(AV_CODEC_ID_H264),NULL) < 0) {
fprintf(stderr,"Output stream cannot open codec\n");
return 1;
}
}
if (!(output_avfmt->oformat->flags & AVFMT_NOFILE)) {
if (avio_open(&output_avfmt->pb, output_file.c_str(), AVIO_FLAG_WRITE) < 0) {
fprintf(stderr,"Output file cannot open file\n");
return 1;
}
}
if (avformat_write_header(output_avfmt,NULL) < 0) {
fprintf(stderr,"Failed to write header\n");
return 1;
}
/* soft break on CTRL+C */
signal(SIGINT,sigma);
signal(SIGHUP,sigma);
signal(SIGQUIT,sigma);
signal(SIGTERM,sigma);
/* prepare video encoding */
for (size_t i=0;i <= output_avstream_video_frame_delay;i++) {
AVFrame *nf;
nf = av_frame_alloc();