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godot/modules/theora/video_stream_theora.cpp

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/**************************************************************************/
/* video_stream_theora.cpp */
/**************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/**************************************************************************/
/* Copyright (c) 2014-present Godot Engine contributors (see AUTHORS.md). */
/* Copyright (c) 2007-2014 Juan Linietsky, Ariel Manzur. */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. */
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/**************************************************************************/
#include "video_stream_theora.h"
#include "core/config/project_settings.h"
#include "core/os/os.h"
#include "scene/resources/image_texture.h"
#ifdef _MSC_VER
#pragma warning(push)
#pragma warning(disable : 4127)
#endif
#include "thirdparty/misc/yuv2rgb.h"
#ifdef _MSC_VER
#pragma warning(pop)
#endif
int VideoStreamPlaybackTheora::buffer_data() {
char *buffer = ogg_sync_buffer(&oy, 4096);
#ifdef THEORA_USE_THREAD_STREAMING
int read;
do {
thread_sem->post();
read = MIN(ring_buffer.data_left(), 4096);
if (read) {
ring_buffer.read((uint8_t *)buffer, read);
ogg_sync_wrote(&oy, read);
} else {
OS::get_singleton()->delay_usec(100);
}
} while (read == 0);
return read;
#else
uint64_t bytes = file->get_buffer((uint8_t *)buffer, 4096);
ogg_sync_wrote(&oy, bytes);
return (bytes);
#endif
}
int VideoStreamPlaybackTheora::queue_page(ogg_page *page) {
if (theora_p) {
ogg_stream_pagein(&to, page);
if (to.e_o_s) {
theora_eos = true;
}
}
if (vorbis_p) {
ogg_stream_pagein(&vo, page);
if (vo.e_o_s) {
vorbis_eos = true;
}
}
return 0;
}
void VideoStreamPlaybackTheora::video_write() {
th_ycbcr_buffer yuv;
th_decode_ycbcr_out(td, yuv);
int pitch = 4;
frame_data.resize(size.x * size.y * pitch);
{
uint8_t *w = frame_data.ptrw();
char *dst = (char *)w;
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);
} 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);
} else if (px_fmt == TH_PF_420) {
yuv420_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);
}
format = Image::FORMAT_RGBA8;
}
Ref<Image> img = memnew(Image(size.x, size.y, 0, Image::FORMAT_RGBA8, frame_data)); //zero copy image creation
texture->update(img); //zero copy send to rendering server
frames_pending = 1;
}
void VideoStreamPlaybackTheora::clear() {
if (file.is_null()) {
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);
#ifdef THEORA_USE_THREAD_STREAMING
thread_exit = true;
thread_sem->post(); //just in case
thread.wait_to_finish();
ring_buffer.clear();
#endif
theora_p = 0;
vorbis_p = 0;
videobuf_ready = 0;
frames_pending = 0;
videobuf_time = 0;
theora_eos = false;
vorbis_eos = false;
file.unref();
playing = false;
}
void VideoStreamPlaybackTheora::set_file(const String &p_file) {
ERR_FAIL_COND(playing);
ogg_packet op;
th_setup_info *ts = nullptr;
file_name = p_file;
file = FileAccess::open(p_file, FileAccess::READ);
ERR_FAIL_COND_MSG(file.is_null(), "Cannot open file '" + p_file + "'.");
#ifdef THEORA_USE_THREAD_STREAMING
thread_exit = false;
thread_eof = false;
//pre-fill buffer
int to_read = ring_buffer.space_left();
uint64_t read = file->get_buffer(read_buffer.ptr(), to_read);
ring_buffer.write(read_buffer.ptr(), read);
thread.start(_streaming_thread, this);
#endif
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);
theora_eos = false;
vorbis_eos = false;
/* Ogg file open; parse the headers */
/* Only interested in Vorbis/Theora streams */
int stateflag = 0;
int audio_track_skip = audio_track;
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 */
memcpy(&to, &test, sizeof(test));
theora_p = 1;
} else if (!vorbis_p && vorbis_synthesis_headerin(&vi, &vc, &op) >= 0) {
/* it is vorbis */
if (audio_track_skip) {
vorbis_info_clear(&vi);
vorbis_comment_clear(&vc);
ogg_stream_clear(&test);
vorbis_info_init(&vi);
vorbis_comment_init(&vc);
audio_track_skip--;
} else {
memcpy(&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 = 0;
/* look for further theora headers */
if (theora_p && theora_p < 3) {
ret = ogg_stream_packetout(&to, &op);
}
while (theora_p && theora_p < 3 && ret) {
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;
}
ret = ogg_stream_packetout(&to, &op);
theora_p++;
}
/* look for more vorbis header packets */
if (vorbis_p && vorbis_p < 3) {
ret = ogg_stream_packetout(&vo, &op);
}
while (vorbis_p && vorbis_p < 3 && ret) {
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;
}
ret = ogg_stream_packetout(&vo, &op);
}
/* 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 ret2 = buffer_data(); /* someone needs more data */
if (ret2 == 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);
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;
}
th_decode_ctl(td, TH_DECCTL_GET_PPLEVEL_MAX, &pp_level_max,
sizeof(pp_level_max));
pp_level = 0;
th_decode_ctl(td, TH_DECCTL_SET_PPLEVEL, &pp_level, sizeof(pp_level));
pp_inc = 0;
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;
Ref<Image> img = Image::create_empty(w, h, false, Image::FORMAT_RGBA8);
texture->set_image(img);
} 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);
//_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;
audio_frames_wrote = 0;
}
double VideoStreamPlaybackTheora::get_time() const {
// FIXME: AudioServer output latency was fixed in af9bb0e, previously it used to
// systematically return 0. Now that it gives a proper latency, it broke this
// code where the delay compensation likely never really worked.
return time - /* AudioServer::get_singleton()->get_output_latency() - */ delay_compensation;
}
Ref<Texture2D> VideoStreamPlaybackTheora::get_texture() const {
return texture;
}
void VideoStreamPlaybackTheora::update(double p_delta) {
if (file.is_null()) {
return;
}
if (!playing || paused) {
//printf("not playing\n");
return;
}
#ifdef THEORA_USE_THREAD_STREAMING
thread_sem->post();
#endif
time += p_delta;
if (videobuf_time > get_time()) {
return; //no new frames need to be produced
}
bool frame_done = false;
bool audio_done = !vorbis_p;
while (!frame_done || (!audio_done && !vorbis_eos)) {
//a frame needs to be produced
ogg_packet op;
bool no_theora = false;
bool buffer_full = false;
while (vorbis_p && !audio_done && !buffer_full) {
int ret;
float **pcm;
/* if there's pending, decoded audio, grab it */
ret = vorbis_synthesis_pcmout(&vd, &pcm);
if (ret > 0) {
const int AUXBUF_LEN = 4096;
int to_read = ret;
float aux_buffer[AUXBUF_LEN];
while (to_read) {
int m = MIN(AUXBUF_LEN / vi.channels, to_read);
int count = 0;
for (int j = 0; j < m; j++) {
for (int i = 0; i < vi.channels; i++) {
aux_buffer[count++] = pcm[i][j];
}
}
if (mix_callback) {
int mixed = mix_callback(mix_udata, aux_buffer, m);
to_read -= mixed;
if (mixed != m) { //could mix no more
buffer_full = true;
break;
}
} else {
to_read -= m; //just pretend we sent the audio
}
}
vorbis_synthesis_read(&vd, ret - to_read);
audio_frames_wrote += ret - to_read;
} 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 */
break;
}
}
audio_done = videobuf_time < (audio_frames_wrote / float(vi.rate));
if (buffer_full) {
break;
}
}
while (theora_p && !frame_done) {
/* theora is one in, one out... */
if (ogg_stream_packetout(&to, &op) > 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()) {
frame_done = true;
} else {
/*If we are too slow, reduce the pp level.*/
pp_inc = pp_level > 0 ? -1 : 0;
}
}
} else {
no_theora = true;
break;
}
}
#ifdef THEORA_USE_THREAD_STREAMING
if (file.is_valid() && thread_eof && no_theora && theora_eos && ring_buffer.data_left() == 0) {
#else
if (file.is_valid() && /*!videobuf_ready && */ no_theora && theora_eos) {
#endif
//printf("video done, stopping\n");
stop();
return;
}
if (!frame_done || !audio_done) {
//what's the point of waiting for audio to grab a 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);
}
double 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;
}
}
video_write();
}
void VideoStreamPlaybackTheora::play() {
if (!playing) {
time = 0;
} else {
stop();
}
playing = true;
delay_compensation = GLOBAL_GET("audio/video/video_delay_compensation_ms");
delay_compensation /= 1000.0;
}
void VideoStreamPlaybackTheora::stop() {
if (playing) {
clear();
set_file(file_name); //reset
}
playing = false;
time = 0;
}
bool VideoStreamPlaybackTheora::is_playing() const {
return playing;
}
void VideoStreamPlaybackTheora::set_paused(bool p_paused) {
paused = p_paused;
}
bool VideoStreamPlaybackTheora::is_paused() const {
return paused;
}
double VideoStreamPlaybackTheora::get_length() const {
return 0;
}
double VideoStreamPlaybackTheora::get_playback_position() const {
return get_time();
}
void VideoStreamPlaybackTheora::seek(double p_time) {
WARN_PRINT_ONCE("Seeking in Theora videos is not implemented yet (it's only supported for GDExtension-provided video streams).");
}
int VideoStreamPlaybackTheora::get_channels() const {
return vi.channels;
}
void VideoStreamPlaybackTheora::set_audio_track(int p_idx) {
audio_track = p_idx;
}
int VideoStreamPlaybackTheora::get_mix_rate() const {
return vi.rate;
}
#ifdef THEORA_USE_THREAD_STREAMING
void VideoStreamPlaybackTheora::_streaming_thread(void *ud) {
VideoStreamPlaybackTheora *vs = static_cast<VideoStreamPlaybackTheora *>(ud);
while (!vs->thread_exit) {
//just fill back the buffer
if (!vs->thread_eof) {
int to_read = vs->ring_buffer.space_left();
if (to_read > 0) {
uint64_t read = vs->file->get_buffer(vs->read_buffer.ptr(), to_read);
vs->ring_buffer.write(vs->read_buffer.ptr(), read);
vs->thread_eof = vs->file->eof_reached();
}
}
vs->thread_sem->wait();
}
}
#endif
VideoStreamPlaybackTheora::VideoStreamPlaybackTheora() {
texture = Ref<ImageTexture>(memnew(ImageTexture));
#ifdef THEORA_USE_THREAD_STREAMING
int rb_power = nearest_shift(RB_SIZE_KB * 1024);
ring_buffer.resize(rb_power);
read_buffer.resize(RB_SIZE_KB * 1024);
thread_sem = Semaphore::create();
#endif
}
VideoStreamPlaybackTheora::~VideoStreamPlaybackTheora() {
#ifdef THEORA_USE_THREAD_STREAMING
memdelete(thread_sem);
#endif
clear();
};
void VideoStreamTheora::_bind_methods() {}
Ref<Resource> ResourceFormatLoaderTheora::load(const String &p_path, const String &p_original_path, Error *r_error, bool p_use_sub_threads, float *r_progress, CacheMode p_cache_mode) {
Ref<FileAccess> f = FileAccess::open(p_path, FileAccess::READ);
if (f.is_null()) {
if (r_error) {
*r_error = ERR_CANT_OPEN;
}
return Ref<Resource>();
}
VideoStreamTheora *stream = memnew(VideoStreamTheora);
stream->set_file(p_path);
Ref<VideoStreamTheora> ogv_stream = Ref<VideoStreamTheora>(stream);
if (r_error) {
*r_error = OK;
}
return ogv_stream;
}
void ResourceFormatLoaderTheora::get_recognized_extensions(List<String> *p_extensions) const {
p_extensions->push_back("ogv");
}
bool ResourceFormatLoaderTheora::handles_type(const String &p_type) const {
return ClassDB::is_parent_class(p_type, "VideoStream");
}
String ResourceFormatLoaderTheora::get_resource_type(const String &p_path) const {
String el = p_path.get_extension().to_lower();
if (el == "ogv") {
return "VideoStreamTheora";
}
return "";
}
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