godot/drivers/theora/video_stream_theora.cpp

#ifdef THEORA_ENABLED

#include "video_stream_theora.h"
#include "os/os.h"
#include "yuv2rgb.h"


AudioStream::UpdateMode VideoStreamTheora::get_update_mode() const {

	return UPDATE_IDLE;
};

int VideoStreamTheora::	buffer_data() {
  char *buffer=ogg_sync_buffer(&oy,4096);
  int bytes=file->get_buffer((uint8_t*)buffer, 4096);

  ogg_sync_wrote(&oy,bytes);
  return(bytes);
}

int VideoStreamTheora::queue_page(ogg_page *page){
  if(theora_p)ogg_stream_pagein(&to,page);
  if(vorbis_p)ogg_stream_pagein(&vo,page);
  return 0;
}

Image VideoStreamTheora::peek_frame() const {

	if (frames_pending == 0)
		return Image();
	return Image(size.x, size.y, 0, format, frame_data);
};

Image VideoStreamTheora::pop_frame() {

	Image ret = peek_frame();
	frames_pending = 0;

	return ret;
};

int VideoStreamTheora::get_pending_frame_count() const {

	return frames_pending;
};

void VideoStreamTheora::video_write(void){
	th_ycbcr_buffer yuv;
	int y_offset, uv_offset;
	th_decode_ycbcr_out(td,yuv);

	y_offset=(ti.pic_x&~1)+yuv[0].stride*(ti.pic_y&~1);

	/*
	{
		int pixels = size.x * size.y;
		frame_data.resize(pixels * 4);
		DVector<uint8_t>::Write w = frame_data.write();
		char* dst = (char*)w.ptr();
		int p = 0;
		for (int i=0; i<size.y; i++) {

			char *in_y  = (char *)yuv[0].data+y_offset+yuv[0].stride*i;
			char *out = dst + (int)size.x * 4 * i;
			for (int j=0;j<size.x;j++) {

				dst[p++] = in_y[j];
				dst[p++] = in_y[j];
				dst[p++] = in_y[j];
				dst[p++] = 255;
			};
		}
		format = Image::FORMAT_RGBA;
	}
	//	*/

	//*

	int pitch = 4;
	frame_data.resize(size.x * size.y * pitch);
	DVector<uint8_t>::Write w = frame_data.write();
	char* dst = (char*)w.ptr();

	uv_offset=(ti.pic_x/2)+(yuv[1].stride)*(ti.pic_y/2);

	if (px_fmt == TH_PF_444) {

		yuv444_2_rgb8888((uint8_t*)dst, (uint8_t*)yuv[0].data, (uint8_t*)yuv[1].data, (uint8_t*)yuv[2].data, size.x, size.y, yuv[0].stride, yuv[1].stride, size.x<<2, 0);

	} else if (px_fmt == TH_PF_422) {

		yuv422_2_rgb8888((uint8_t*)dst, (uint8_t*)yuv[0].data, (uint8_t*)yuv[1].data, (uint8_t*)yuv[2].data, size.x, size.y, yuv[0].stride, yuv[1].stride, size.x<<2, 0);

	} else if (px_fmt == TH_PF_420) {

		yuv420_2_rgb8888((uint8_t*)dst, (uint8_t*)yuv[0].data, (uint8_t*)yuv[2].data, (uint8_t*)yuv[1].data, size.x, size.y, yuv[0].stride, yuv[1].stride, size.x<<2, 0);
	};

	format = Image::FORMAT_RGBA;

	/*

	if (px_fmt == TH_PF_444) {

		int pitch = 3;
		frame_data.resize(size.x * size.y * pitch);
		DVector<uint8_t>::Write w = frame_data.write();
		char* dst = (char*)w.ptr();

		for(int i=0;i<size.y;i++) {

			char *in_y  = (char *)yuv[0].data+y_offset+yuv[0].stride*i;
			char *out = dst + (int)size.x * pitch * i;
			char *in_u  = (char *)yuv[1].data+uv_offset+yuv[1].stride*i;
			char *in_v  = (char *)yuv[2].data+uv_offset+yuv[2].stride*i;
			for (int j=0;j<size.x;j++) {

				out[j*3+0] = in_y[j];
				out[j*3+1] = in_u[j];
				out[j*3+2] = in_v[j];
			};
		}

		format = Image::FORMAT_YUV_444;

	} else {

		int div;
		if (px_fmt!=TH_PF_422) {
			div = 2;
		}

		bool rgba = true;
		if (rgba) {

			int pitch = 4;
			frame_data.resize(size.x * size.y * pitch);
			DVector<uint8_t>::Write w = frame_data.write();
			char* dst = (char*)w.ptr();

			uv_offset=(ti.pic_x/2)+(yuv[1].stride)*(ti.pic_y / div);
			for(int i=0;i<size.y;i++) {
				char *in_y  = (char *)yuv[0].data+y_offset+yuv[0].stride*i;
				char *in_u  = (char *)yuv[1].data+uv_offset+yuv[1].stride*(i/div);
				char *in_v  = (char *)yuv[2].data+uv_offset+yuv[2].stride*(i/div);
				uint8_t *out = (uint8_t*)dst + (int)size.x * pitch * i;
				int ofs = 0;
				for (int j=0;j<size.x;j++) {

					uint8_t y, u, v;
					y = in_y[j];
					u = in_u[j/2];
					v = in_v[j/2];

					int32_t r = Math::fast_ftoi(1.164 * (y - 16) + 1.596 * (v - 128));
					int32_t g = Math::fast_ftoi(1.164 * (y - 16) - 0.813 * (v - 128) - 0.391 * (u - 128));
					int32_t b = Math::fast_ftoi(1.164 * (y - 16) + 2.018 * (u - 128));

					out[ofs++] = CLAMP(r, 0, 255);
					out[ofs++] = CLAMP(g, 0, 255);
					out[ofs++] = CLAMP(b, 0, 255);
					out[ofs++] = 255;
				}
			}

			format = Image::FORMAT_RGBA;

		} else {

			int pitch = 2;
			frame_data.resize(size.x * size.y * pitch);
			DVector<uint8_t>::Write w = frame_data.write();
			char* dst = (char*)w.ptr();

			uv_offset=(ti.pic_x/2)+(yuv[1].stride)*(ti.pic_y / div);
			for(int i=0;i<size.y;i++) {
				char *in_y  = (char *)yuv[0].data+y_offset+yuv[0].stride*i;
				char *out = dst + (int)size.x * pitch * i;
				for (int j=0;j<size.x;j++)
					out[j*2] = in_y[j];
				char *in_u  = (char *)yuv[1].data+uv_offset+yuv[1].stride*(i/div);
				char *in_v  = (char *)yuv[2].data+uv_offset+yuv[2].stride*(i/div);
				for (int j=0;j<(int)size.x>>1;j++) {
					out[j*4+1] = in_u[j];
					out[j*4+3] = in_v[j];
				}
			}

			format = Image::FORMAT_YUV_422;
		};
	};
	//	*/

	frames_pending = 1;
}

void VideoStreamTheora::clear() {

	if (file_name == "")
		return;

	if(vorbis_p){
		ogg_stream_clear(&vo);
		if (vorbis_p >= 3) {
			vorbis_block_clear(&vb);
			vorbis_dsp_clear(&vd);
		};
		vorbis_comment_clear(&vc);
		vorbis_info_clear(&vi);
		vorbis_p = 0;
	}
	if(theora_p){
		ogg_stream_clear(&to);
		th_decode_free(td);
		th_comment_clear(&tc);
		th_info_clear(&ti);
		theora_p = 0;
	}
	ogg_sync_clear(&oy);

	file_name = "";

	theora_p = 0;
	vorbis_p = 0;
	videobuf_ready = 0;
	frames_pending = 0;
	videobuf_time = 0;

	playing = false;
};

void VideoStreamTheora::set_file(const String& p_file) {

	ogg_packet op;
	th_setup_info    *ts = NULL;

	file_name = p_file;
	if (file) {
		memdelete(file);
	}
	file = FileAccess::open(p_file, FileAccess::READ);
	ERR_FAIL_COND(!file);

	audio_frames_wrote = 0;

	ogg_sync_init(&oy);

	/* init supporting Vorbis structures needed in header parsing */
	vorbis_info_init(&vi);
	vorbis_comment_init(&vc);

	/* init supporting Theora structures needed in header parsing */
	th_comment_init(&tc);
	th_info_init(&ti);

	/* Ogg file open; parse the headers */
	/* Only interested in Vorbis/Theora streams */
	int stateflag = 0;
	while(!stateflag){
		int ret=buffer_data();
		if(ret==0)break;
		while(ogg_sync_pageout(&oy,&og)>0){
			ogg_stream_state test;

			/* is this a mandated initial header? If not, stop parsing */
			if(!ogg_page_bos(&og)){
				/* don't leak the page; get it into the appropriate stream */
				queue_page(&og);
				stateflag=1;
				break;
			}

			ogg_stream_init(&test,ogg_page_serialno(&og));
			ogg_stream_pagein(&test,&og);
			ogg_stream_packetout(&test,&op);


			/* identify the codec: try theora */
			if(!theora_p && th_decode_headerin(&ti,&tc,&ts,&op)>=0){
				/* it is theora */
				copymem(&to,&test,sizeof(test));
				theora_p=1;
			}else if(!vorbis_p && vorbis_synthesis_headerin(&vi,&vc,&op)>=0){
				/* it is vorbis */
				copymem(&vo,&test,sizeof(test));
				vorbis_p=1;
			}else{
				/* whatever it is, we don't care about it */
				ogg_stream_clear(&test);
			}
		}
		/* fall through to non-bos page parsing */
	}

	/* we're expecting more header packets. */
	while((theora_p && theora_p<3) || (vorbis_p && vorbis_p<3)){
		int ret;

		/* look for further theora headers */
		while(theora_p && (theora_p<3) && (ret=ogg_stream_packetout(&to,&op))){
			if(ret<0){
				fprintf(stderr,"Error parsing Theora stream headers; "
						"corrupt stream?\n");
				clear();
				return;
			}
			if(!th_decode_headerin(&ti,&tc,&ts,&op)){
				fprintf(stderr,"Error parsing Theora stream headers; "
						"corrupt stream?\n");
				clear();
				return;
			}
			theora_p++;
		}

		/* look for more vorbis header packets */
		while(vorbis_p && (vorbis_p<3) && (ret=ogg_stream_packetout(&vo,&op))){
			if(ret<0){
				fprintf(stderr,"Error parsing Vorbis stream headers; corrupt stream?\n");
				clear();
				return;
			}
			ret = vorbis_synthesis_headerin(&vi,&vc,&op);
			if(ret){
				fprintf(stderr,"Error parsing Vorbis stream headers; corrupt stream?\n");
				clear();
				return;
			}
			vorbis_p++;
			if(vorbis_p==3)break;
		}

		/* The header pages/packets will arrive before anything else we
		care about, or the stream is not obeying spec */

		if(ogg_sync_pageout(&oy,&og)>0){
			queue_page(&og); /* demux into the appropriate stream */
		}else{
			int ret=buffer_data(); /* someone needs more data */
			if(ret==0){
				fprintf(stderr,"End of file while searching for codec headers.\n");
				clear();
				return;
			}
		}
	}

	/* and now we have it all.  initialize decoders */
	if(theora_p){
		td=th_decode_alloc(&ti,ts);
		printf("Ogg logical stream %lx is Theora %dx%d %.02f fps",
			   to.serialno,ti.pic_width,ti.pic_height,
			   (double)ti.fps_numerator/ti.fps_denominator);
		px_fmt=ti.pixel_fmt;
		switch(ti.pixel_fmt){
		case TH_PF_420: printf(" 4:2:0 video\n"); break;
		case TH_PF_422: printf(" 4:2:2 video\n"); break;
		case TH_PF_444: printf(" 4:4:4 video\n"); break;
		case TH_PF_RSVD:
		default:
			printf(" video\n  (UNKNOWN Chroma sampling!)\n");
			break;
		}
		if(ti.pic_width!=ti.frame_width || ti.pic_height!=ti.frame_height)
			printf("  Frame content is %dx%d with offset (%d,%d).\n",
				   ti.frame_width, ti.frame_height, ti.pic_x, ti.pic_y);
		th_decode_ctl(td,TH_DECCTL_GET_PPLEVEL_MAX,&pp_level_max,
					  sizeof(pp_level_max));
		pp_level=pp_level_max;
		th_decode_ctl(td,TH_DECCTL_SET_PPLEVEL,&pp_level,sizeof(pp_level));
		pp_inc=0;

		/*{
		int arg = 0xffff;
		th_decode_ctl(td,TH_DECCTL_SET_TELEMETRY_MBMODE,&arg,sizeof(arg));
		th_decode_ctl(td,TH_DECCTL_SET_TELEMETRY_MV,&arg,sizeof(arg));
		th_decode_ctl(td,TH_DECCTL_SET_TELEMETRY_QI,&arg,sizeof(arg));
		arg=10;
		th_decode_ctl(td,TH_DECCTL_SET_TELEMETRY_BITS,&arg,sizeof(arg));
		}*/

		int w;
		int h;
		w=(ti.pic_x+ti.frame_width+1&~1)-(ti.pic_x&~1);
		h=(ti.pic_y+ti.frame_height+1&~1)-(ti.pic_y&~1);
		size.x = w;
		size.y = h;

	}else{
		/* tear down the partial theora setup */
		th_info_clear(&ti);
		th_comment_clear(&tc);
	}

	th_setup_free(ts);

	if(vorbis_p){
		vorbis_synthesis_init(&vd,&vi);
		vorbis_block_init(&vd,&vb);
		fprintf(stderr,"Ogg logical stream %lx is Vorbis %d channel %ld Hz audio.\n",
				vo.serialno,vi.channels,vi.rate);
		_setup(vi.channels, vi.rate);
	}else{
		/* tear down the partial vorbis setup */
		vorbis_info_clear(&vi);
		vorbis_comment_clear(&vc);
	}

	playing = false;
	buffering=true;
	time=0;
};

float VideoStreamTheora::get_time() const {

	//print_line("total: "+itos(get_total())+" todo: "+itos(get_todo()));
	//return MAX(0,time-((get_total())/(float)vi.rate));
	return time-((get_total())/(float)vi.rate);
};

void VideoStreamTheora::update() {

	if (!playing) {
		//printf("not playing\n");
		return;
	};

	double ctime =AudioServer::get_singleton()->get_mix_time();

	if (last_update_time) {
		double delta = (ctime-last_update_time);
		time+=delta;
		//print_line("delta: "+rtos(delta));
	}
	last_update_time=ctime;


	int audio_todo = get_todo();
	ogg_packet op;
	int audio_pending = 0;


	while (vorbis_p && audio_todo) {
		int ret;
		float **pcm;

		/* if there's pending, decoded audio, grab it */
		if ((ret=vorbis_synthesis_pcmout(&vd,&pcm))>0) {

			audio_pending = ret;
			int16_t* out = get_write_buffer();
			int count = 0;
			int to_read = MIN(ret, audio_todo);
			for (int i=0; i<to_read; i++) {

				for(int j=0;j<vi.channels;j++){
					int val=Math::fast_ftoi(pcm[j][i]*32767.f);
					if(val>32767)val=32767;
					if(val<-32768)val=-32768;
					out[count++] = val;
				};
			};
			int tr = vorbis_synthesis_read(&vd, to_read);
			audio_todo -= to_read;
			audio_frames_wrote += to_read;
			write(to_read);
			audio_pending -= to_read;
			if (audio_todo==0)
				buffering=false;


		} else {

			/* no pending audio; is there a pending packet to decode? */
			if (ogg_stream_packetout(&vo,&op)>0){
				if(vorbis_synthesis(&vb,&op)==0) { /* test for success! */
					vorbis_synthesis_blockin(&vd,&vb);
				}
			} else {  /* we need more data; break out to suck in another page */
				//printf("need moar data\n");
				break;
			};
		}
	}

	while(theora_p && !videobuf_ready){
		/* theora is one in, one out... */
		if(ogg_stream_packetout(&to,&op)>0){


			if(pp_inc){
				pp_level+=pp_inc;
				th_decode_ctl(td,TH_DECCTL_SET_PPLEVEL,&pp_level,
							  sizeof(pp_level));
				pp_inc=0;
			}
			/*HACK: This should be set after a seek or a gap, but we might not have
			a granulepos for the first packet (we only have them for the last
			packet on a page), so we just set it as often as we get it.
			To do this right, we should back-track from the last packet on the
			page and compute the correct granulepos for the first packet after
			a seek or a gap.*/
			if(op.granulepos>=0){
				th_decode_ctl(td,TH_DECCTL_SET_GRANPOS,&op.granulepos,
							  sizeof(op.granulepos));
			}
			ogg_int64_t videobuf_granulepos;
			if(th_decode_packetin(td,&op,&videobuf_granulepos)==0){
				videobuf_time=th_granule_time(td,videobuf_granulepos);
				//printf("frame time %f, play time %f, ready %i\n", (float)videobuf_time, get_time(), videobuf_ready);

				/* is it already too old to be useful?  This is only actually
				 useful cosmetically after a SIGSTOP.  Note that we have to
				 decode the frame even if we don't show it (for now) due to
				 keyframing.  Soon enough libtheora will be able to deal
				 with non-keyframe seeks.  */

				if(videobuf_time>=get_time())
					videobuf_ready=1;
				else{
					/*If we are too slow, reduce the pp level.*/
					pp_inc=pp_level>0?-1:0;
				}
			}

		} else
			break;
	}

	if (/*!videobuf_ready && */ audio_pending == 0 && file->eof_reached()) {
		printf("video done, stopping\n");
		stop();
		return;
	};

	if (!videobuf_ready || audio_todo > 0){
		/* no data yet for somebody.  Grab another page */

		buffer_data();
		while(ogg_sync_pageout(&oy,&og)>0){
			queue_page(&og);
		}
	}

	/* If playback has begun, top audio buffer off immediately. */
	//if(stateflag) audio_write_nonblocking();

	/* are we at or past time for this video frame? */
	if(videobuf_ready && videobuf_time<=get_time()){

		video_write();
		videobuf_ready=0;
	} else {
		//printf("frame at %f not ready (time %f), ready %i\n", (float)videobuf_time, get_time(), videobuf_ready);
	}

	float tdiff=videobuf_time-get_time();
	/*If we have lots of extra time, increase the post-processing level.*/
	if(tdiff>ti.fps_denominator*0.25/ti.fps_numerator){
		pp_inc=pp_level<pp_level_max?1:0;
	}
	else if(tdiff<ti.fps_denominator*0.05/ti.fps_numerator){
		pp_inc=pp_level>0?-1:0;
	}
};

bool VideoStreamTheora::_can_mix() const {

	return !buffering;
};

void VideoStreamTheora::play() {

	if (!playing)
		last_update_time=0;
	playing = true;
};

void VideoStreamTheora::stop() {

	playing = false;
	last_update_time=0;
};

bool VideoStreamTheora::is_playing() const {

	return playing;
};

void VideoStreamTheora::set_paused(bool p_paused) {

	playing = !p_paused;
};

bool VideoStreamTheora::is_paused(bool p_paused) const {

	return playing;
};

void VideoStreamTheora::set_loop(bool p_enable) {

};

bool VideoStreamTheora::has_loop() const {

	return false;
};

float VideoStreamTheora::get_length() const {

	return 0;
};

String VideoStreamTheora::get_stream_name() const {

	return "";
};

int VideoStreamTheora::get_loop_count() const {

	return 0;
};

float VideoStreamTheora::get_pos() const {

	return get_time();
};

void VideoStreamTheora::seek_pos(float p_time) {

	// no
};

VideoStreamTheora::VideoStreamTheora() {

	file = NULL;
	theora_p = 0;
	vorbis_p = 0;
	videobuf_ready = 0;
	playing = false;
	frames_pending = 0;
	videobuf_time = 0;
	last_update_time =0;
	buffering=false;
};

VideoStreamTheora::~VideoStreamTheora() {

	clear();

	if (file)
		memdelete(file);
};


RES ResourceFormatLoaderVideoStreamTheora::load(const String &p_path,const String& p_original_path) {

	VideoStreamTheora *stream = memnew(VideoStreamTheora);
	stream->set_file(p_path);
	return Ref<VideoStreamTheora>(stream);
}

void ResourceFormatLoaderVideoStreamTheora::get_recognized_extensions(List<String> *p_extensions) const {

	p_extensions->push_back("ogm");
	p_extensions->push_back("ogv");
}
bool ResourceFormatLoaderVideoStreamTheora::handles_type(const String& p_type) const {
	return (p_type=="AudioStream" || p_type=="VideoStreamTheora");
}

String ResourceFormatLoaderVideoStreamTheora::get_resource_type(const String &p_path) const {

	String exl=p_path.extension().to_lower();
	if (exl=="ogm" || exl=="ogv")
		return "AudioStreamTheora";
	return "";
}

#endif