314 lines
7.7 KiB
C++
314 lines
7.7 KiB
C++
/*
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This file is part of Telegram Desktop,
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the official desktop application for the Telegram messaging service.
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For license and copyright information please follow this link:
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https://github.com/telegramdesktop/tdesktop/blob/master/LEGAL
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*/
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#include "media/streaming/media_streaming_utility.h"
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#include "media/streaming/media_streaming_common.h"
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#include "ui/image/image_prepare.h"
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#include "ffmpeg/ffmpeg_utility.h"
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namespace Media {
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namespace Streaming {
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namespace {
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constexpr auto kSkipInvalidDataPackets = 10;
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} // namespace
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crl::time FramePosition(const Stream &stream) {
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const auto pts = !stream.frame
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? AV_NOPTS_VALUE
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: (stream.frame->best_effort_timestamp != AV_NOPTS_VALUE)
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? stream.frame->best_effort_timestamp
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: (stream.frame->pts != AV_NOPTS_VALUE)
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? stream.frame->pts
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: stream.frame->pkt_dts;
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return FFmpeg::PtsToTime(pts, stream.timeBase);
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}
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FFmpeg::AvErrorWrap ProcessPacket(Stream &stream, FFmpeg::Packet &&packet) {
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Expects(stream.codec != nullptr);
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auto error = FFmpeg::AvErrorWrap();
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const auto native = &packet.fields();
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const auto guard = gsl::finally([
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&,
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size = native->size,
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data = native->data
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] {
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native->size = size;
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native->data = data;
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packet = FFmpeg::Packet();
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});
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error = avcodec_send_packet(
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stream.codec.get(),
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native->data ? native : nullptr); // Drain on eof.
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if (error) {
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LogError(qstr("avcodec_send_packet"), error);
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if (error.code() == AVERROR_INVALIDDATA
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// There is a sample voice message where skipping such packet
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// results in a crash (read_access to nullptr) in swr_convert().
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&& stream.codec->codec_id != AV_CODEC_ID_OPUS) {
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if (++stream.invalidDataPackets < kSkipInvalidDataPackets) {
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return FFmpeg::AvErrorWrap(); // Try to skip a bad packet.
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}
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}
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} else {
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stream.invalidDataPackets = 0;
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}
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return error;
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}
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FFmpeg::AvErrorWrap ReadNextFrame(Stream &stream) {
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Expects(stream.frame != nullptr);
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auto error = FFmpeg::AvErrorWrap();
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do {
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error = avcodec_receive_frame(
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stream.codec.get(),
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stream.frame.get());
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if (!error
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|| error.code() != AVERROR(EAGAIN)
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|| stream.queue.empty()) {
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return error;
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}
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error = ProcessPacket(stream, std::move(stream.queue.front()));
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stream.queue.pop_front();
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} while (!error);
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return error;
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}
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bool GoodForRequest(
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const QImage &image,
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int rotation,
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const FrameRequest &request) {
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if (image.isNull()) {
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return false;
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} else if (request.resize.isEmpty()) {
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return true;
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} else if (rotation != 0) {
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return false;
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} else if ((request.radius != ImageRoundRadius::None)
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&& ((request.corners & RectPart::AllCorners) != 0)) {
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return false;
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}
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return (request.resize == request.outer)
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&& (request.resize == image.size());
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}
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QImage ConvertFrame(
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Stream &stream,
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AVFrame *frame,
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QSize resize,
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QImage storage) {
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Expects(frame != nullptr);
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const auto frameSize = QSize(frame->width, frame->height);
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if (frameSize.isEmpty()) {
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LOG(("Streaming Error: Bad frame size %1,%2"
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).arg(frameSize.width()
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).arg(frameSize.height()));
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return QImage();
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} else if (!FFmpeg::FrameHasData(frame)) {
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LOG(("Streaming Error: Bad frame data."));
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return QImage();
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}
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if (resize.isEmpty()) {
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resize = frameSize;
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} else if (FFmpeg::RotationSwapWidthHeight(stream.rotation)) {
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resize.transpose();
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}
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if (!FFmpeg::GoodStorageForFrame(storage, resize)) {
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storage = FFmpeg::CreateFrameStorage(resize);
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}
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const auto format = AV_PIX_FMT_BGRA;
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const auto hasDesiredFormat = (frame->format == format);
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if (frameSize == storage.size() && hasDesiredFormat) {
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static_assert(sizeof(uint32) == FFmpeg::kPixelBytesSize);
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auto to = reinterpret_cast<uint32*>(storage.bits());
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auto from = reinterpret_cast<const uint32*>(frame->data[0]);
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const auto deltaTo = (storage.bytesPerLine() / sizeof(uint32))
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- storage.width();
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const auto deltaFrom = (frame->linesize[0] / sizeof(uint32))
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- frame->width;
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for ([[maybe_unused]] const auto y : ranges::views::ints(0, frame->height)) {
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for ([[maybe_unused]] const auto x : ranges::views::ints(0, frame->width)) {
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// Wipe out possible alpha values.
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*to++ = 0xFF000000U | *from++;
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}
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to += deltaTo;
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from += deltaFrom;
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}
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} else {
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stream.swscale = MakeSwscalePointer(
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frame,
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resize,
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&stream.swscale);
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if (!stream.swscale) {
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return QImage();
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}
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// AV_NUM_DATA_POINTERS defined in AVFrame struct
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uint8_t *data[AV_NUM_DATA_POINTERS] = { storage.bits(), nullptr };
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int linesize[AV_NUM_DATA_POINTERS] = { int(storage.bytesPerLine()), 0 };
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sws_scale(
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stream.swscale.get(),
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frame->data,
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frame->linesize,
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0,
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frame->height,
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data,
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linesize);
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}
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FFmpeg::ClearFrameMemory(frame);
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return storage;
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}
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FrameYUV420 ExtractYUV420(Stream &stream, AVFrame *frame) {
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return {
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.size = { frame->width, frame->height },
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.chromaSize = {
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AV_CEIL_RSHIFT(frame->width, 1), // SWScale does that.
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AV_CEIL_RSHIFT(frame->height, 1)
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},
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.y = { .data = frame->data[0], .stride = frame->linesize[0] },
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.u = { .data = frame->data[1], .stride = frame->linesize[1] },
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.v = { .data = frame->data[2], .stride = frame->linesize[2] },
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};
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}
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void PaintFrameOuter(QPainter &p, const QRect &inner, QSize outer) {
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const auto left = inner.x();
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const auto right = outer.width() - inner.width() - left;
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const auto top = inner.y();
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const auto bottom = outer.height() - inner.height() - top;
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if (left > 0) {
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p.fillRect(0, 0, left, outer.height(), st::imageBg);
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}
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if (right > 0) {
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p.fillRect(
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outer.width() - right,
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0,
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right,
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outer.height(),
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st::imageBg);
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}
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if (top > 0) {
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p.fillRect(left, 0, inner.width(), top, st::imageBg);
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}
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if (bottom > 0) {
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p.fillRect(
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left,
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outer.height() - bottom,
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inner.width(),
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bottom,
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st::imageBg);
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}
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}
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void PaintFrameInner(
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QPainter &p,
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QRect to,
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const QImage &original,
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bool alpha,
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int rotation) {
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const auto rotated = [](QRect rect, int rotation) {
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switch (rotation) {
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case 0: return rect;
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case 90: return QRect(
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rect.y(),
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-rect.x() - rect.width(),
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rect.height(),
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rect.width());
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case 180: return QRect(
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-rect.x() - rect.width(),
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-rect.y() - rect.height(),
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rect.width(),
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rect.height());
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case 270: return QRect(
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-rect.y() - rect.height(),
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rect.x(),
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rect.height(),
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rect.width());
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}
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Unexpected("Rotation in PaintFrameInner.");
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};
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PainterHighQualityEnabler hq(p);
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if (rotation) {
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p.rotate(rotation);
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}
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const auto rect = rotated(to, rotation);
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if (alpha) {
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p.fillRect(rect, Qt::white);
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}
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p.drawImage(rect, original);
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}
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void PaintFrameContent(
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QPainter &p,
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const QImage &original,
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bool alpha,
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int rotation,
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const FrameRequest &request) {
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const auto full = request.outer.isEmpty()
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? original.size()
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: request.outer;
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const auto size = request.resize.isEmpty()
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? original.size()
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: request.resize;
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const auto to = QRect(
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(full.width() - size.width()) / 2,
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(full.height() - size.height()) / 2,
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size.width(),
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size.height());
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PaintFrameOuter(p, to, full);
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PaintFrameInner(p, to, original, alpha, rotation);
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}
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void ApplyFrameRounding(QImage &storage, const FrameRequest &request) {
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if (!(request.corners & RectPart::AllCorners)
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|| (request.radius == ImageRoundRadius::None)) {
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return;
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}
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Images::prepareRound(storage, request.radius, request.corners);
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}
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QImage PrepareByRequest(
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const QImage &original,
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bool alpha,
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int rotation,
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const FrameRequest &request,
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QImage storage) {
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Expects(!request.outer.isEmpty() || alpha);
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const auto outer = request.outer.isEmpty()
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? original.size()
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: request.outer;
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if (!FFmpeg::GoodStorageForFrame(storage, outer)) {
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storage = FFmpeg::CreateFrameStorage(outer);
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}
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QPainter p(&storage);
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PaintFrameContent(p, original, alpha, rotation, request);
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p.end();
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ApplyFrameRounding(storage, request);
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return storage;
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}
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} // namespace Streaming
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} // namespace Media
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