commit 2451fa1b5ac22a366f2813cb9a3256e9a32bd010 Author: Adrian Shum Date: Thu Sep 8 20:44:10 2022 +0800 feat: imagorvideo init diff --git a/.dockerignore b/.dockerignore new file mode 100644 index 0000000..aa6d957 --- /dev/null +++ b/.dockerignore @@ -0,0 +1,10 @@ +**/*~ +.git +.env +.idea +bin +tmp/ +.DS_Store +.vscode +bin/imagorvideo +profile.cov diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..311551a --- /dev/null +++ b/.gitignore @@ -0,0 +1,11 @@ +vendor/ +**/*.log +**/*.sqlite +.idea/ +.DS_Store +bin/ +tmp/ +.vscode/ +.env +bin/imagorvideo +profile.cov diff --git a/Dockerfile b/Dockerfile new file mode 100644 index 0000000..7e59de1 --- /dev/null +++ b/Dockerfile @@ -0,0 +1,136 @@ +ARG GOLANG_VERSION=1.19.0 +FROM golang:${GOLANG_VERSION}-bullseye as builder + +ARG FFMPEG_VERSION=5.1.1 +ARG VIPS_VERSION=8.13.1 +ARG CGIF_VERSION=0.3.0 +ARG LIBSPNG_VERSION=0.7.2 +ARG TARGETARCH + +ENV PKG_CONFIG_PATH=/usr/local/lib/pkgconfig +ENV MAKEFLAGS="-j8" + +# libaom3 is in Debian bullseye-backports +RUN echo 'deb http://deb.debian.org/debian bullseye-backports main' > /etc/apt/sources.list.d/backports.list + +# Installs libvips + required libraries +RUN DEBIAN_FRONTEND=noninteractive \ + apt-get update && \ + apt-get install --no-install-recommends -y \ + ca-certificates \ + automake build-essential curl \ + python3-pip ninja-build pkg-config \ + gobject-introspection gtk-doc-tools libglib2.0-dev libjpeg62-turbo-dev libpng-dev \ + libwebp-dev libtiff5-dev libexif-dev libxml2-dev libpoppler-glib-dev \ + swig libpango1.0-dev libmatio-dev libopenslide-dev libcfitsio-dev libopenjp2-7-dev \ + libgsf-1-dev fftw3-dev liborc-0.4-dev librsvg2-dev libimagequant-dev libaom-dev/bullseye-backports libheif-dev \ + yasm libx264-dev libx265-dev libnuma-dev libvpx-dev libtheora-dev \ + librtmp-dev libvorbis-dev && \ + pip3 install meson && \ + cd /tmp && \ + curl -fsSLO https://github.com/dloebl/cgif/archive/refs/tags/V${CGIF_VERSION}.tar.gz && \ + tar xf V${CGIF_VERSION}.tar.gz && \ + cd cgif-${CGIF_VERSION} && \ + meson build --prefix=/usr/local --libdir=/usr/local/lib --buildtype=release && \ + cd build && \ + ninja && \ + ninja install && \ + cd /tmp && \ + curl -fsSLO https://github.com/randy408/libspng/archive/refs/tags/v${LIBSPNG_VERSION}.tar.gz && \ + tar xf v${LIBSPNG_VERSION}.tar.gz && \ + cd libspng-${LIBSPNG_VERSION} && \ + meson setup _build \ + --buildtype=release \ + --strip \ + --prefix=/usr/local \ + --libdir=lib && \ + ninja -C _build && \ + ninja -C _build install && \ + cd /tmp && \ + curl -fsSLO https://github.com/libvips/libvips/releases/download/v${VIPS_VERSION}/vips-${VIPS_VERSION}.tar.gz && \ + tar zvxf vips-${VIPS_VERSION}.tar.gz && \ + cd /tmp/vips-${VIPS_VERSION} && \ + meson setup _build \ + --buildtype=release \ + --strip \ + --prefix=/usr/local \ + --libdir=lib \ + -Dgtk_doc=false \ + -Dmagick=disabled \ + -Dintrospection=false && \ + ninja -C _build && \ + ninja -C _build install && \ + cd /tmp && \ + curl -fsSLO https://ffmpeg.org/releases/ffmpeg-${FFMPEG_VERSION}.tar.bz2 && \ + tar jvxf ffmpeg-${FFMPEG_VERSION}.tar.bz2 && \ + cd /tmp/ffmpeg-${FFMPEG_VERSION} && \ + ./configure --prefix=/usr/local \ + --disable-debug \ + --disable-doc \ + --disable-ffplay \ + --disable-static \ + --enable-shared \ + --enable-version3 \ + --enable-gpl \ + --enable-libtheora \ + --enable-libvorbis \ + --enable-librtmp \ + --enable-libwebp \ + --enable-libvpx \ + --enable-libx265 \ + --enable-libx264 && \ + make && make install && \ + ldconfig && \ + rm -rf /usr/local/lib/python* && \ + rm -rf /usr/local/lib/libvips-cpp.* && \ + rm -rf /usr/local/lib/*.a && \ + rm -rf /usr/local/lib/*.la + +WORKDIR ${GOPATH}/src/github.com/cshum/imagorvideo + +COPY go.mod . +COPY go.sum . + +RUN go mod download + +COPY . . + +RUN if [ "$TARGETARCH" = "amd64" ]; then go test ./...; fi +RUN go build -o ${GOPATH}/bin/imagorvideo ./cmd/imagorvideo/main.go + +FROM debian:bullseye-slim +LABEL maintainer="adrian@cshum.com" + +COPY --from=builder /usr/local/lib /usr/local/lib +COPY --from=builder /etc/ssl/certs /etc/ssl/certs +COPY --from=builder /etc/apt/sources.list.d/backports.list /etc/apt/sources.list.d/backports.list + +# Install runtime dependencies +RUN DEBIAN_FRONTEND=noninteractive \ + apt-get update && \ + apt-get install --no-install-recommends -y \ + procps libglib2.0-0 libjpeg62-turbo libpng16-16 libopenexr25 \ + libwebp6 libwebpmux3 libwebpdemux2 libtiff5 libexif12 libxml2 libpoppler-glib8 \ + libpango1.0-0 libmatio11 libopenslide0 libopenjp2-7 libjemalloc2 \ + libgsf-1-114 fftw3 liborc-0.4-0 librsvg2-2 libcfitsio9 libimagequant0 libaom3 libheif1 \ + libx264-dev libx265-dev libnuma-dev libvpx6 libtheora0 libvorbis-dev && \ + ln -s /usr/lib/$(uname -m)-linux-gnu/libjemalloc.so.2 /usr/local/lib/libjemalloc.so && \ + apt-get autoremove -y && \ + apt-get autoclean && \ + apt-get clean && \ + rm -rf /var/lib/apt/lists/* /tmp/* /var/tmp/* + +COPY --from=builder /go/bin/imagorvideo /usr/local/bin/imagorvideo + +ENV VIPS_WARNING=0 +ENV MALLOC_ARENA_MAX=2 +ENV LD_PRELOAD=/usr/local/lib/libjemalloc.so + +ENV PORT 8000 + +# use unprivileged user +USER nobody + +ENTRYPOINT ["/usr/local/bin/imagorvideo"] + +EXPOSE ${PORT} diff --git a/LICENSE b/LICENSE new file mode 100644 index 0000000..d9a10c0 --- /dev/null +++ b/LICENSE @@ -0,0 +1,176 @@ + Apache License + Version 2.0, January 2004 + http://www.apache.org/licenses/ + + TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION + + 1. 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In no event and under no legal theory, + whether in tort (including negligence), contract, or otherwise, + unless required by applicable law (such as deliberate and grossly + negligent acts) or agreed to in writing, shall any Contributor be + liable to You for damages, including any direct, indirect, special, + incidental, or consequential damages of any character arising as a + result of this License or out of the use or inability to use the + Work (including but not limited to damages for loss of goodwill, + work stoppage, computer failure or malfunction, or any and all + other commercial damages or losses), even if such Contributor + has been advised of the possibility of such damages. + + 9. Accepting Warranty or Additional Liability. While redistributing + the Work or Derivative Works thereof, You may choose to offer, + and charge a fee for, acceptance of support, warranty, indemnity, + or other liability obligations and/or rights consistent with this + License. However, in accepting such obligations, You may act only + on Your own behalf and on Your sole responsibility, not on behalf + of any other Contributor, and only if You agree to indemnify, + defend, and hold each Contributor harmless for any liability + incurred by, or claims asserted against, such Contributor by reason + of your accepting any such warranty or additional liability. + + END OF TERMS AND CONDITIONS diff --git a/Makefile b/Makefile new file mode 100644 index 0000000..ff1fe6a --- /dev/null +++ b/Makefile @@ -0,0 +1,23 @@ +build: + CGO_CFLAGS_ALLOW=-Xpreprocessor go build -o bin/imagorvideo ./cmd/imagorvideo/main.go + +test: + go clean -testcache && CGO_CFLAGS_ALLOW=-Xpreprocessor go test -coverprofile=profile.cov ./... + +dev: build + ./bin/imagorvideo -debug -imagor-unsafe + +help: build + ./bin/imagorvideo -h + +get: + go get -v -t -d ./... + +docker-dev-build: + docker build -t imagorvideo:dev . + +docker-dev-run: + touch .env + docker run --rm -p 8000:8000 --env-file .env imagorvideo:dev -debug -imagor-unsafe + +docker-dev: docker-dev-build docker-dev-run diff --git a/README.md b/README.md new file mode 100644 index 0000000..0b33da6 --- /dev/null +++ b/README.md @@ -0,0 +1,28 @@ +# imagorvideo + +imagorvideo is a new initiative that brings video thumbnail capability through ffmpeg, built on the foundations of [imagor](https://github.com/cshum/imagor). imagor is a fast, Docker-ready image processing server written in Go with libvips. + +Imagorvideo uses ffmpeg C bindings that extracts image thumbnail from video by attempting to select the best frame, then forwards to libvips to perform all existing image operations supported by imagor. + +imagorvideo uses reader stream for mkv and webm video types. For other video types that requires seeking from a non seek-able source such as HTTP or S3, it simulates seek using memory buffer or temp file, by having the whole file to be fully loaded to perform seek. + +**This project is a work in progress**. It also aims to be a reference project demonstrating imagor extensibility. Feel free to create a pull request or report an issue if you found bugs, suggestions or enhancements. + +### Quick Start + +```bash +docker run -p 8000:8000 shumc/imagorvideo -imagor-unsafe +``` + +Check out [imagor](https://github.com/cshum/imagor#image-endpoint) for all existing image operations supported. + +### Configuration + +Config options specific to imagorvideo. Check out [imagor](https://github.com/cshum/imagor#configuration) for all existing options supported. + +``` + -ffmpeg-fallback-image string + FFmpeg fallback image on processing error. Supports image path enabled by loaders or storages +``` + + diff --git a/cmd/imagorvideo/main.go b/cmd/imagorvideo/main.go new file mode 100644 index 0000000..3c87657 --- /dev/null +++ b/cmd/imagorvideo/main.go @@ -0,0 +1,23 @@ +package main + +import ( + "github.com/cshum/imagor/config" + "github.com/cshum/imagor/config/awsconfig" + "github.com/cshum/imagor/config/gcloudconfig" + "github.com/cshum/imagor/config/vipsconfig" + "github.com/cshum/imagorvideo" + "os" +) + +func main() { + var server = config.CreateServer( + os.Args[1:], + imagorvideo.Config, + vipsconfig.WithVips, + awsconfig.WithAWS, + gcloudconfig.WithGCloud, + ) + if server != nil { + server.Run() + } +} diff --git a/config.go b/config.go new file mode 100644 index 0000000..0d3f77c --- /dev/null +++ b/config.go @@ -0,0 +1,23 @@ +package imagorvideo + +import ( + "flag" + "github.com/cshum/imagor" + "go.uber.org/zap" +) + +func Config(fs *flag.FlagSet, cb func() (*zap.Logger, bool)) imagor.Option { + var ( + ffmpegFallbackImage = fs.String("ffmpeg-fallback-image", "", + "FFmpeg fallback image on processing error. Supports image path enabled by loaders or storages") + + logger, isDebug = cb() + ) + return imagor.WithProcessors( + NewProcessor( + WithFallbackImage(*ffmpegFallbackImage), + WithLogger(logger), + WithDebug(isDebug), + ), + ) +} diff --git a/ffmpeg/callback.go b/ffmpeg/callback.go new file mode 100644 index 0000000..d12017b --- /dev/null +++ b/ffmpeg/callback.go @@ -0,0 +1,54 @@ +package ffmpeg + +// #include "ffmpeg.h" +import "C" +import ( + "github.com/cshum/imagorvideo/ffmpeg/pointer" + "io" + "unsafe" +) + +//export goPacketRead +func goPacketRead(opaque unsafe.Pointer, buf *C.uint8_t, bufSize C.int) C.int { + ctx, ok := pointer.Restore(opaque).(*AVContext) + if !ok || ctx.reader == nil { + return C.int(ErrUnknown) + } + p := (*[1 << 30]byte)(unsafe.Pointer(buf))[:bufSize:bufSize] + n, err := ctx.reader.Read(p) + if err == io.EOF { + return C.int(ErrEOF) + } else if err != nil { + return C.int(ErrUnknown) + } + return C.int(n) +} + +//export goPacketSeek +func goPacketSeek(opaque unsafe.Pointer, offset C.int64_t, whence C.int) C.int64_t { + ctx, ok := pointer.Restore(opaque).(*AVContext) + if !ok || ctx.seeker == nil { + return C.int64_t(ErrUnknown) + } + if whence == C.AVSEEK_SIZE && ctx.size > 0 { + return C.int64_t(ctx.size) + } + n, err := ctx.seeker.Seek(int64(offset), int(whence)) + if err != nil { + return C.int64_t(ErrUnknown) + } + return C.int64_t(n) +} + +//export goInterrupt +func goInterrupt(opaque unsafe.Pointer) C.int { + if ctx, ok := pointer.Restore(opaque).(*AVContext); ok { + select { + case <-ctx.context.Done(): + return 1 + default: + return 0 + } + } + return 0 +} diff --git a/ffmpeg/errors.go b/ffmpeg/errors.go new file mode 100644 index 0000000..128bc87 --- /dev/null +++ b/ffmpeg/errors.go @@ -0,0 +1,39 @@ +package ffmpeg + +// #include "ffmpeg.h" +import "C" +import ( + "strconv" + "unsafe" +) + +type avError int + +const ( + ErrNoMem = avError(-C.ENOMEM) + ErrEOF = avError(C.AVERROR_EOF) + ErrUnknown = avError(C.AVERROR_UNKNOWN) + ErrDecoderNotFound = avError(C.AVERROR_DECODER_NOT_FOUND) + ErrInvalidData = avError(C.AVERROR_INVALIDDATA) + ErrTooBig = avError(C.ERR_TOO_BIG) +) + +func (e avError) errorString() string { + if e == ErrNoMem { + return "cannot allocate memory" + } + if e == ErrTooBig { + return "video or cover art size exceeds maximum allowed dimensions" + } + errString := (*C.char)(C.av_malloc(C.AV_ERROR_MAX_STRING_SIZE)) + if errString == nil { + return "cannot allocate memory for error string, error code: " + strconv.Itoa(int(e)) + } + defer C.av_free(unsafe.Pointer(errString)) + C.av_make_error_string(errString, C.AV_ERROR_MAX_STRING_SIZE, C.int(e)) + return C.GoString(errString) +} + +func (e avError) Error() string { + return "ffmpeg: " + e.errorString() +} diff --git a/ffmpeg/ffmpeg.c b/ffmpeg/ffmpeg.c new file mode 100644 index 0000000..82e91ec --- /dev/null +++ b/ffmpeg/ffmpeg.c @@ -0,0 +1,480 @@ +#include "ffmpeg.h" + +pthread_mutex_t mutex = PTHREAD_MUTEX_INITIALIZER; + +void free_format_context(AVFormatContext *fmt_ctx) { + if (!fmt_ctx) { + return; + } + av_free(fmt_ctx->pb->buffer); + avio_context_free(&fmt_ctx->pb); + avformat_close_input(&fmt_ctx); +} + +int allocate_format_context(AVFormatContext **fmt_ctx) { + AVFormatContext *ctx = NULL; + if (!(ctx = avformat_alloc_context())) { + return AVERROR(ENOMEM); + } + *fmt_ctx = ctx; + return 0; +} + +int create_format_context(AVFormatContext *fmt_ctx, void* opaque, int flags) { + int err = 0; + uint8_t *avio_buffer = NULL; + AVIOContext *avio_ctx = NULL; + if (!(avio_buffer = av_malloc(BUFFER_SIZE))) { + avformat_free_context(fmt_ctx); + return AVERROR(ENOMEM); + } + void *reader = NULL; + void *seeker = NULL; + int write_flag = 0; + int seekable = 0; + if (flags & READ_PACKET_FLAG) { + reader = goPacketRead; + } + if (flags & SEEK_PACKET_FLAG) { + seeker = goPacketSeek; + seekable = 1; + } + if (flags & INTERRUPT_FLAG) { + fmt_ctx->interrupt_callback.callback = goInterrupt; + fmt_ctx->interrupt_callback.opaque = opaque; + } + if (!(avio_ctx = avio_alloc_context(avio_buffer, BUFFER_SIZE, write_flag, opaque, reader, NULL, seeker))) { + av_free(avio_buffer); + avformat_free_context(fmt_ctx); + return AVERROR(ENOMEM); + } + fmt_ctx->pb = avio_ctx; + fmt_ctx->pb->seekable = seekable; + err = avformat_open_input(&fmt_ctx, NULL, NULL, NULL); + if (err < 0) { + av_free(avio_ctx->buffer); + avio_context_free(&avio_ctx); + free_format_context(fmt_ctx); + return err; + } + err = pthread_mutex_lock(&mutex); + if (err < 0) { + free_format_context(fmt_ctx); + return err; + } + err = avformat_find_stream_info(fmt_ctx, NULL); + int muErr = pthread_mutex_unlock(&mutex); + if (err < 0 || muErr < 0) { + free_format_context(fmt_ctx); + if (muErr < 0) { + return muErr; + } + } + return err; +} + +static int get_orientation(AVStream *video_stream) { + uint8_t *display_matrix = av_stream_get_side_data(video_stream, AV_PKT_DATA_DISPLAYMATRIX, NULL); + double theta = 0; + if (display_matrix) { + theta = -av_display_rotation_get((int32_t *) display_matrix); + } + + theta -= 360 * floor(theta / 360 + 0.9 / 360); + + int rot = (int) (90 * round(theta / 90)) % 360; + + switch (rot) { + case 90: + return 6; + case 180: + return 3; + case 270: + return 8; + default: + return 1; + }; +} + +void get_metadata(AVFormatContext *fmt_ctx, char **artist, char **title) { + AVDictionaryEntry *tag = NULL; + if ((tag = av_dict_get(fmt_ctx->metadata, "artist", NULL, 0))) { + *artist = tag->value; + } + if ((tag = av_dict_get(fmt_ctx->metadata, "title", NULL, 0))) { + *title = tag->value; + } +} + +int find_streams(AVFormatContext *fmt_ctx, AVStream **video_stream, int *orientation) { + int video_stream_index = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_VIDEO, -1, -1, NULL, 0); + int audio_stream_index = av_find_best_stream(fmt_ctx, AVMEDIA_TYPE_AUDIO, -1, -1, NULL, 0); + int video_audio = 0; + if (audio_stream_index >= 0) { + video_audio |= HAS_AUDIO_STREAM; + } + if (video_stream_index >= 0) { + video_audio |= HAS_VIDEO_STREAM; + } else { + if (video_audio) { + return video_audio; + } + return AVERROR_STREAM_NOT_FOUND; + } + *video_stream = fmt_ctx->streams[video_stream_index]; + *orientation = get_orientation(*video_stream); + return video_audio; +} + +static int open_codec(AVCodecContext *codec_ctx, AVCodec *codec) { + int err = pthread_mutex_lock(&mutex); + if (err < 0) { + return err; + } + err = avcodec_open2(codec_ctx, codec, NULL); + int muErr = pthread_mutex_unlock(&mutex); + if (muErr < 0) { + return muErr; + } + return err; +} + +int create_codec_context(AVStream *video_stream, AVCodecContext **dec_ctx) { + AVCodec *dec = NULL; + AVCodecParameters *par = video_stream->codecpar; + if (par->codec_id == AV_CODEC_ID_VP8) { + dec = avcodec_find_decoder_by_name("libvpx"); + } else if (par->codec_id == AV_CODEC_ID_VP9) { + dec = avcodec_find_decoder_by_name("libvpx-vp9"); + } + if (!dec) { + dec = avcodec_find_decoder(par->codec_id); + } + if (dec == NULL) { + return AVERROR_DECODER_NOT_FOUND; + } + if (par->format == -1) { + return AVERROR_INVALIDDATA; + } + if (av_get_bits_per_pixel(av_pix_fmt_desc_get(par->format)) * par->height * par->width > 1 << 30) { + return ERR_TOO_BIG; + } + if (!(*dec_ctx = avcodec_alloc_context3(dec))) { + return AVERROR(ENOMEM); + } + int err = avcodec_parameters_to_context(*dec_ctx, par); + if (err < 0) { + avcodec_free_context(dec_ctx); + return err; + } + err = open_codec(*dec_ctx, dec); + if (err < 0) { + avcodec_free_context(dec_ctx); + } + return err; +} + +AVFrame *convert_frame_to_rgb(AVFrame *frame, int alpha) { + int output_fmt = alpha ? AV_PIX_FMT_RGBA : AV_PIX_FMT_RGB24; + struct SwsContext *sws_ctx = NULL; + AVFrame *output_frame = av_frame_alloc(); + if (!output_frame) { + return output_frame; + } + output_frame->height = frame->height; + output_frame->width = frame->width; + output_frame->format = output_fmt; + if (av_frame_get_buffer(output_frame, 1) < 0) { + goto free; + } + if (output_fmt == frame->format) { + if (av_frame_copy(output_frame, frame) < 0) { + goto free; + } + goto done; + } + sws_ctx = sws_getContext(frame->width, frame->height, frame->format, + output_frame->width, output_frame->height, output_fmt, + SWS_LANCZOS | SWS_ACCURATE_RND, NULL, NULL, NULL); + if (!sws_ctx) { + goto free; + } + if (sws_scale(sws_ctx, (const uint8_t *const *) frame->data, frame->linesize, 0, frame->height, output_frame->data, + output_frame->linesize) != output_frame->height) { + goto free; + } else { + goto done; + } + free: + av_frame_free(&output_frame); + done: + if (sws_ctx) { + sws_freeContext(sws_ctx); + } + return output_frame; +} + +int encode_frame_to_image(AVFormatContext *fmt_ctx, AVFrame *frame, AVPacket *pkt) { + AVCodec *enc = avcodec_find_encoder(AV_CODEC_ID_PNG); + if (!enc) { + return AVERROR_ENCODER_NOT_FOUND; + } + AVCodecContext *enc_ctx = avcodec_alloc_context3(enc); + if (!enc_ctx) { + return AVERROR(ENOMEM); + } + enc_ctx->width = frame->width; + enc_ctx->height = frame->height; + enc_ctx->pix_fmt = frame->format; + enc_ctx->codec_type = AVMEDIA_TYPE_VIDEO; + enc_ctx->time_base = (AVRational) {1, 1}; + enc_ctx->compression_level = INT_MAX; + int err = open_codec(enc_ctx, enc); + if (err < 0) { + avcodec_free_context(&enc_ctx); + return err; + } + err = avcodec_send_frame(enc_ctx, frame); + if (err < 0) { + avcodec_free_context(&enc_ctx); + return err; + } + err = avcodec_receive_packet(enc_ctx, pkt); + avcodec_free_context(&enc_ctx); + return err; +} + +AVPacket create_packet() { + AVPacket *pkt = av_packet_alloc(); + pkt->data = NULL; + pkt->size = 0; + return *pkt; +} + +int +obtain_next_frame(AVFormatContext *fmt_ctx, AVCodecContext *dec_ctx, int stream_index, AVPacket *pkt, AVFrame **frame) { + int err = 0, retry = 0; + if (!(*frame) && !(*frame = av_frame_alloc())) { + err = AVERROR(ENOMEM); + return err; + } + if ((err = avcodec_receive_frame(dec_ctx, *frame)) != AVERROR(EAGAIN)) { + return err; + } + while (1) { + if ((err = av_read_frame(fmt_ctx, pkt)) < 0) { + break; + } + if (pkt->stream_index != stream_index) { + av_packet_unref(pkt); + continue; + } + if ((err = avcodec_send_packet(dec_ctx, pkt)) < 0) { + if (retry++ >= 10) { + break; + } + continue; + } + if (!(*frame) && !(*frame = av_frame_alloc())) { + err = AVERROR(ENOMEM); + break; + } + err = avcodec_receive_frame(dec_ctx, *frame); + if (err >= 0 || err != AVERROR(EAGAIN)) { + break; + } + av_packet_unref(pkt); + } + if (pkt->buf) { + av_packet_unref(pkt); + } + return err; +} + +int64_t find_duration(AVFormatContext *fmt_ctx) { + AVPacket pkt = create_packet(); + int err = 0; + int64_t duration = 0; + while (err >= 0) { + err = av_read_frame(fmt_ctx, &pkt); + if (pkt.pts != AV_NOPTS_VALUE) { + AVRational time_base = fmt_ctx->streams[pkt.stream_index]->time_base; + duration = FFMAX(duration, pkt.pts * 1000000000 * time_base.num / time_base.den); + } + av_packet_unref(&pkt); + } + if (err == AVERROR_EOF) { + return duration; + } + return err; +} + +ThumbContext *create_thumb_context(AVStream *stream, AVFrame *frame) { + ThumbContext *thumb_ctx = av_mallocz(sizeof *thumb_ctx); + if (!thumb_ctx) { + return thumb_ctx; + } +// thumb_ctx->n = 0; + thumb_ctx->desc = av_pix_fmt_desc_get(frame->format); + int nb_frames = 100; + if (stream->disposition & AV_DISPOSITION_ATTACHED_PIC) { + nb_frames = 1; + } else if (stream->nb_frames && stream->nb_frames < 400) { + nb_frames = (int) (stream->nb_frames >> 2) + 1; + } + int frames_in_128mb = (1 << 30) / (av_get_bits_per_pixel(thumb_ctx->desc) * frame->height * frame->width); + thumb_ctx->max_frames = FFMIN(nb_frames, frames_in_128mb); +// thumb_ctx->hist_size = 0; +// thumb_ctx->alpha = 0; + int i; + for (i = 0; i < thumb_ctx->desc->nb_components; i++) { + thumb_ctx->hist_size += 1 << thumb_ctx->desc->comp[i].depth; + } + thumb_ctx->median = av_calloc(thumb_ctx->hist_size, sizeof(double)); + if (!thumb_ctx->median) { + av_free(thumb_ctx); + return NULL; + } + thumb_ctx->frames = av_malloc_array((size_t) thumb_ctx->max_frames, sizeof *thumb_ctx->frames); + if (!thumb_ctx->frames) { + av_free(thumb_ctx->median); + av_free(thumb_ctx); + return NULL; + } + for (i = 0; i < thumb_ctx->max_frames; i++) { + thumb_ctx->frames[i].frame = NULL; + thumb_ctx->frames[i].hist = av_calloc(thumb_ctx->hist_size, sizeof(int)); + if (!thumb_ctx->frames[i].hist) { + for (i--; i >= 0; i--) { + av_free(thumb_ctx->frames[i].hist); + } + av_free(thumb_ctx->median); + av_free(thumb_ctx); + return NULL; + } + } + return thumb_ctx; +} + +void free_thumb_context(ThumbContext *thumb_ctx) { + if (!thumb_ctx) { + return; + } + int i; + for (i = 0; i < thumb_ctx->n; i++) { + av_frame_free(&thumb_ctx->frames[i].frame); + av_free(thumb_ctx->frames[i].hist); + } + for (i = thumb_ctx->n; i < thumb_ctx->max_frames; i++) { + av_free(thumb_ctx->frames[i].hist); + } + av_free(thumb_ctx->median); + av_free(thumb_ctx->frames); + av_free(thumb_ctx); +} + +static double root_mean_square_error(const int *hist, const double *median, size_t hist_size) { + int i; + double err, sum_sq_err = 0; + for (i = 0; i < hist_size; i++) { + err = median[i] - (double) hist[i]; + sum_sq_err += err * err; + } + return sum_sq_err; +} + +static int alpha_check(const AVFrame *frame, const uint64_t flags, const int last_hist_num) { + if (flags & AV_PIX_FMT_FLAG_PAL) { + for (int i = 3; i <= 1023; i += 4) { + if (frame->data[1][i] != 255) { + return 1; + } + } + } else if (flags & AV_PIX_FMT_FLAG_ALPHA && last_hist_num < frame->width * frame->height) { + return 1; + } + return 0; +} + +void populate_histogram(ThumbContext *thumb_ctx, int n, AVFrame *frame) { + const AVPixFmtDescriptor *desc = thumb_ctx->desc; + thumb_ctx->frames[n].frame = frame; + int *hist = thumb_ctx->frames[n].hist; + AVComponentDescriptor comp; + int w, h, plane, depth, mask, shift, step, height, width; + uint64_t flags; + uint8_t **data = frame->data; + int *linesize = frame->linesize; + for (int c = 0; c < desc->nb_components; c++) { + comp = desc->comp[c]; + plane = comp.plane; + depth = comp.depth; + mask = (1 << depth) - 1; + shift = comp.shift; + step = comp.step; + flags = desc->flags; + width = !(desc->log2_chroma_w) || (c != 1 && c != 2) ? frame->width : AV_CEIL_RSHIFT(frame->width, + desc->log2_chroma_w); + height = !(desc->log2_chroma_h) || (c != 1 && c != 2) ? frame->height : AV_CEIL_RSHIFT(frame->height, + desc->log2_chroma_h); + for (h = 0; h < height; h++) { + w = width; + if (flags & AV_PIX_FMT_FLAG_BITSTREAM) { + const uint8_t *p = data[plane] + h * linesize[plane] + (comp.offset >> 3); + shift = 8 - depth - (comp.offset & 7); + + while (w--) { + int val = (*p >> shift) & mask; + shift -= step; + p -= shift >> 3; + shift &= 7; + (*(hist + val))++; + } + } else { + const uint8_t *p = data[plane] + h * linesize[plane] + comp.offset; + int is_8bit = shift + depth <= 8; + + if (is_8bit) + p += (flags & AV_PIX_FMT_FLAG_BE) != 0; + + while (w--) { + int val = is_8bit ? *p : + flags & AV_PIX_FMT_FLAG_BE ? AV_RB16(p) : AV_RL16(p); + val = (val >> shift) & mask; + p += step; + (*(hist + val))++; + } + } + } + hist += 1 << depth; + } +} + +static AVFrame *get_best_frame(ThumbContext *thumb_ctx) { + struct thumb_frame *t_frame = NULL; + double min_sum_sq_err = DBL_MAX, sum_sq_err = 0; + int i, n = 0; + for (i = 0; i < thumb_ctx->n; i++) { + t_frame = thumb_ctx->frames + i; + sum_sq_err = root_mean_square_error(t_frame->hist, thumb_ctx->median, thumb_ctx->hist_size); + if (sum_sq_err < min_sum_sq_err) { + min_sum_sq_err = sum_sq_err; + n = i; + } + } + thumb_ctx->alpha = alpha_check(thumb_ctx->frames[n].frame, thumb_ctx->desc->flags, + thumb_ctx->frames[n].hist[thumb_ctx->hist_size - 1]); + return thumb_ctx->frames[n].frame; +} + +AVFrame *process_frames(ThumbContext *thumb_ctx) { + int i, j, *hist = NULL, n = thumb_ctx->n; + double *median = thumb_ctx->median; + for (j = 0; j < n; j++) { + hist = thumb_ctx->frames[j].hist; + for (i = 0; i < thumb_ctx->hist_size; i++) { + median[i] += (double) hist[i] / n; + } + } + return get_best_frame(thumb_ctx); +} \ No newline at end of file diff --git a/ffmpeg/ffmpeg.go b/ffmpeg/ffmpeg.go new file mode 100644 index 0000000..71c8131 --- /dev/null +++ b/ffmpeg/ffmpeg.go @@ -0,0 +1,290 @@ +package ffmpeg + +// #cgo pkg-config: libavformat libavutil libavcodec libswscale +// #cgo CFLAGS: -std=c11 +// #cgo LDFLAGS: -lm +// #include "ffmpeg.h" +import "C" +import ( + "context" + "github.com/cshum/imagorvideo/ffmpeg/pointer" + "io" + "time" + "unsafe" +) + +const ( + readPacketFlag = 1 + seekPacketFlag = 2 + interruptFlag = 3 + hasVideo = 1 + hasAudio = 2 +) + +type Metadata struct { + Orientation int `json:"orientation"` + Duration time.Duration `json:"duration,omitempty"` + Width int `json:"width,omitempty"` + Height int `json:"height,omitempty"` + Title string `json:"title,omitempty"` + Artist string `json:"artist,omitempty"` + HasVideo bool `json:"has_video"` + HasAudio bool `json:"has_audio"` + HasAlpha bool `json:"has_alpha"` +} + +type AVContext struct { + context context.Context + opaque unsafe.Pointer + reader io.Reader + seeker io.Seeker + formatContext *C.AVFormatContext + stream *C.AVStream + codecContext *C.AVCodecContext + thumbContext *C.ThumbContext + frame *C.AVFrame + durationInFormat bool + + orientation int + size int64 + duration time.Duration + width, height int + title, artist string + hasVideo, hasAudio bool + hasFrame, hasAlpha bool +} + +func LoadAVContext(ctx context.Context, reader io.Reader, size int64) (*AVContext, error) { + av := &AVContext{ + context: ctx, + reader: reader, + size: size, + } + if seeker, ok := reader.(io.Seeker); ok { + av.seeker = seeker + } + flags := C.int(readPacketFlag | interruptFlag) + if av.seeker != nil { + flags |= seekPacketFlag + } + err := createFormatContext(av, flags) + if err != nil { + return nil, err + } + if !av.hasVideo { + return av, nil + } + if err = createDecoder(av); err == ErrTooBig || err == ErrDecoderNotFound { + return av, err + } + return av, nil +} + +func (av *AVContext) ExportImage() ([]byte, error) { + if !av.hasFrame { + return nil, nil + } + return encodeFrameImage(av) +} + +func (av *AVContext) Close() { + freeFormatContext(av) +} + +func (av *AVContext) Metadata() *Metadata { + return &Metadata{ + Orientation: av.orientation, + Duration: av.duration, + Width: av.width, + Height: av.height, + Title: av.title, + Artist: av.artist, + HasVideo: av.hasVideo, + HasAudio: av.hasAudio, + HasAlpha: av.hasAlpha, + } +} + +func freeFormatContext(av *AVContext) { + C.free_format_context(av.formatContext) + pointer.Unref(av.opaque) +} + +func createFormatContext(av *AVContext, callbackFlags C.int) error { + intErr := C.allocate_format_context(&av.formatContext) + if intErr < 0 { + return avError(intErr) + } + av.opaque = pointer.Save(av) + intErr = C.create_format_context(av.formatContext, av.opaque, callbackFlags) + if intErr < 0 { + pointer.Unref(av.opaque) + return avError(intErr) + } + metaData(av) + duration(av) + err := findStreams(av) + if err != nil { + freeFormatContext(av) + } + return err +} + +func metaData(av *AVContext) { + var artist, title *C.char + C.get_metadata(av.formatContext, &artist, &title) + av.artist = C.GoString(artist) + av.title = C.GoString(title) +} + +func duration(av *AVContext) { + if av.formatContext.duration > 0 { + av.durationInFormat = true + av.duration = time.Duration(1000 * av.formatContext.duration) + } +} + +func fullDuration(av *AVContext) error { + if av.durationInFormat { + return nil + } + newDuration := time.Duration(C.find_duration(av.formatContext)) + if newDuration < 0 { + return avError(newDuration) + } + if newDuration > av.duration { + av.duration = newDuration + } + return nil +} + +func findStreams(av *AVContext) error { + var orientation C.int + err := C.find_streams(av.formatContext, &av.stream, &orientation) + if err < 0 { + return avError(err) + } + av.hasVideo = err&hasVideo != 0 + av.hasAudio = err&hasAudio != 0 + if av.hasVideo { + av.width = int(av.stream.codecpar.width) + av.height = int(av.stream.codecpar.height) + av.orientation = int(orientation) + } + return nil +} + +func createDecoder(av *AVContext) error { + err := C.create_codec_context(av.stream, &av.codecContext) + if err < 0 { + return avError(err) + } + defer C.avcodec_free_context(&av.codecContext) + return createThumbContext(av) +} + +func incrementDuration(av *AVContext, frame *C.AVFrame) { + if !av.durationInFormat && frame.pts != C.AV_NOPTS_VALUE { + ptsToNano := C.int64_t(1000000000 * av.stream.time_base.num / av.stream.time_base.den) + newDuration := time.Duration(frame.pts * ptsToNano) + if newDuration > av.duration { + av.duration = newDuration + } + } +} + +func populateHistogram(av *AVContext, frames <-chan *C.AVFrame) <-chan struct{} { + done := make(chan struct{}) + go func() { + var n C.int + for frame := range frames { + C.populate_histogram(av.thumbContext, n, frame) + n++ + } + av.thumbContext.n = n + done <- struct{}{} + close(done) + }() + return done +} + +func createThumbContext(av *AVContext) error { + pkt := C.create_packet() + var frame *C.AVFrame + err := C.obtain_next_frame(av.formatContext, av.codecContext, av.stream.index, &pkt, &frame) + if err >= 0 { + incrementDuration(av, frame) + av.thumbContext = C.create_thumb_context(av.stream, frame) + if av.thumbContext == nil { + err = C.int(ErrNoMem) + } + } + if err < 0 { + if pkt.buf != nil { + C.av_packet_unref(&pkt) + } + if frame != nil { + C.av_frame_free(&frame) + } + return avError(err) + } + defer C.free_thumb_context(av.thumbContext) + frames := make(chan *C.AVFrame, av.thumbContext.max_frames) + done := populateHistogram(av, frames) + frames <- frame + if pkt.buf != nil { + C.av_packet_unref(&pkt) + } + return populateThumbContext(av, frames, done) +} + +func populateThumbContext(av *AVContext, frames chan *C.AVFrame, done <-chan struct{}) error { + pkt := C.create_packet() + var frame *C.AVFrame + var err C.int + for i := C.int(1); i < av.thumbContext.max_frames; i++ { + err = C.obtain_next_frame(av.formatContext, av.codecContext, av.stream.index, &pkt, &frame) + if err < 0 { + break + } + incrementDuration(av, frame) + frames <- frame + frame = nil + } + close(frames) + if pkt.buf != nil { + C.av_packet_unref(&pkt) + } + if frame != nil { + C.av_frame_free(&frame) + } + <-done + if err != 0 && err != C.int(ErrEOF) { + return avError(err) + } + return convertFrameToRGB(av) +} + +func convertFrameToRGB(av *AVContext) error { + outputFrame := C.convert_frame_to_rgb(C.process_frames(av.thumbContext), av.thumbContext.alpha) + if outputFrame == nil { + return ErrNoMem + } + av.frame = outputFrame + av.hasFrame = true + av.hasAlpha = av.thumbContext.alpha != 0 + return nil +} + +func encodeFrameImage(av *AVContext) ([]byte, error) { + pkt := C.create_packet() + err := C.encode_frame_to_image(av.formatContext, av.frame, &pkt) + if err < 0 { + return nil, avError(err) + } + p := (*[1 << 30]byte)(unsafe.Pointer(pkt.data))[:pkt.size:pkt.size] + if pkt.buf != nil { + C.av_packet_unref(&pkt) + } + return p, nil +} diff --git a/ffmpeg/ffmpeg.h b/ffmpeg/ffmpeg.h new file mode 100644 index 0000000..a0d33b6 --- /dev/null +++ b/ffmpeg/ffmpeg.h @@ -0,0 +1,72 @@ +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include +#include +#include +#include + +#define BUFFER_SIZE 1 << 12 +#define READ_PACKET_FLAG 1 +#define SEEK_PACKET_FLAG 2 +#define INTERRUPT_FLAG 3 +#define HAS_VIDEO_STREAM 1 +#define HAS_AUDIO_STREAM 2 +#define ERR_TOO_BIG FFERRTAG('H','M','M','M') + +struct thumb_frame { + AVFrame *frame; + int *hist; +}; + +typedef struct ThumbContext { + int n, alpha, max_frames; + struct thumb_frame *frames; + double *median; + const AVPixFmtDescriptor *desc; + size_t hist_size; +} ThumbContext; + +int allocate_format_context(AVFormatContext **fmt_ctx); + +int create_format_context(AVFormatContext *fmt_ctx, void* opaque, int callbacks); + +void free_format_context(AVFormatContext *fmt_ctx); + +void get_metadata(AVFormatContext *fmt_ctx, char **artist, char **title); + +int find_streams(AVFormatContext *fmt_ctx, AVStream **video_stream, int *orientation); + +int create_codec_context(AVStream *video_stream, AVCodecContext **dec_ctx); + +AVFrame *convert_frame_to_rgb(AVFrame *frame, int alpha); + +int encode_frame_to_image(AVFormatContext *fmt_ctx, AVFrame *frame, AVPacket *pkt); + +AVPacket create_packet(); + +int +obtain_next_frame(AVFormatContext *fmt_ctx, AVCodecContext *dec_ctx, int stream_index, AVPacket *pkt, AVFrame **frame); + +int64_t find_duration(AVFormatContext *fmt_ctx); + +ThumbContext *create_thumb_context(AVStream *stream, AVFrame *frame); + +void free_thumb_context(ThumbContext *thumb_ctx); + +AVFrame *process_frames(ThumbContext *thumb_ctx); + +void populate_histogram(ThumbContext *thumb_ctx, int n, AVFrame *frame); + +extern int goPacketRead(void *opaque, uint8_t *buf, int buf_size); + +extern int64_t goPacketSeek(void *opaque, int64_t seek, int whence); + +extern int goInterrupt(void *opaque); \ No newline at end of file diff --git a/ffmpeg/logging.go b/ffmpeg/logging.go new file mode 100644 index 0000000..9be4697 --- /dev/null +++ b/ffmpeg/logging.go @@ -0,0 +1,29 @@ +package ffmpeg + +// #include "ffmpeg.h" +import "C" + +// AVLogLevel defines the ffmpeg threshold for dumping information to stderr. +type AVLogLevel int + +// Possible values for AVLogLevel. +const ( + AVLogQuiet AVLogLevel = (iota - 1) * 8 + AVLogPanic + AVLogFatal + AVLogError + AVLogWarning + AVLogInfo + AVLogVerbose + AVLogDebug + AVLogTrace +) + +func logLevel() AVLogLevel { + return AVLogLevel(C.av_log_get_level()) +} + +// SetFFmpegLogLevel allows you to change the log level from the default (AVLogInfo). +func SetFFmpegLogLevel(logLevel AVLogLevel) { + C.av_log_set_level(C.int(logLevel)) +} diff --git a/ffmpeg/pointer/pointer.go b/ffmpeg/pointer/pointer.go new file mode 100644 index 0000000..5673d1d --- /dev/null +++ b/ffmpeg/pointer/pointer.go @@ -0,0 +1,100 @@ +package pointer + +// #include +import "C" + +import ( + "sync" + "unsafe" +) + +const blockSize = 1024 + +var ( + mutex sync.RWMutex + store = map[unsafe.Pointer]interface{}{} + free []unsafe.Pointer + blocks []unsafe.Pointer +) + +func allocMem() { + mem := C.malloc(blockSize) + if mem == nil { + panic("can't allocate memory block for C pointers") + } + blocks = append(blocks, mem) + for i := 0; i < blockSize; i++ { + p := unsafe.Pointer(uintptr(mem) + uintptr(blockSize-1-i)) + free = append(free, p) + } +} + +func getPtr() unsafe.Pointer { + // Generate real fake C pointer. + // This pointer will not store any data, but will be used for indexing + // purposes. Since Go doesn't allow to cast dangling pointer to + // unsafe.Pointer, we do really allocate memory. Why we need indexing? Because + // Go doest allow C code to store pointers to Go data. + if len(free) == 0 { + allocMem() + } + n := len(free) - 1 + p := free[n] + free = free[:n] + return p +} + +// Save an object in the storage and return an index pointer to it. +func Save(v interface{}) unsafe.Pointer { + if v == nil { + return nil + } + + mutex.Lock() + ptr := getPtr() + store[ptr] = v + mutex.Unlock() + + return ptr +} + +// Restore an object from the storage by its index pointer. +func Restore(ptr unsafe.Pointer) (v interface{}) { + if ptr == nil { + return nil + } + + mutex.RLock() + v = store[ptr] + mutex.RUnlock() + return +} + +// Unref removes an object from the storage and returns the index pointer to the +// pool for reuse. +func Unref(ptr unsafe.Pointer) { + if ptr == nil { + return + } + + mutex.Lock() + if _, ok := store[ptr]; ok { + delete(store, ptr) + free = append(free, ptr) + } + mutex.Unlock() +} + +// Clear storage and free all memory +func Clear() { + mutex.Lock() + for p := range store { + delete(store, p) + } + free = nil + for _, p := range blocks { + C.free(p) + } + blocks = nil + mutex.Unlock() +} diff --git a/ffmpeg/pointer/pointer_test.go b/ffmpeg/pointer/pointer_test.go new file mode 100644 index 0000000..a3ef460 --- /dev/null +++ b/ffmpeg/pointer/pointer_test.go @@ -0,0 +1,176 @@ +package pointer + +import ( + "sync" + "testing" + "unsafe" + + "github.com/stretchr/testify/assert" +) + +func TestPointer(t *testing.T) { + t.Cleanup(Clear) + // assert := makeAssert(t) + assert.Len(t, store, 0) + assert.Len(t, free, 0) + assert.Len(t, blocks, 0) + mutex.Lock() + assert.Equal(t, unsafe.Pointer(nil), Save(nil)) + assert.Nil(t, Restore(nil)) + Unref(nil) + mutex.Unlock() + i1 := Save("foo") + i2 := Save("bar") + i3 := Save("baz") + assert.Len(t, store, 3) + assert.Len(t, free, blockSize-3) + assert.Len(t, blocks, 1) + var x interface{} + x = Restore(i1) + assert.NotNil(t, x) + if s, ok := x.(string); ok { + assert.Equal(t, "foo", s) + } else { + t.Fail() + } + x = Restore(unsafe.Pointer(&x)) + assert.Nil(t, x) + x = Restore(i3) + assert.NotNil(t, x) + if s, ok := x.(string); ok { + assert.Equal(t, "baz", s) + } else { + t.Fail() + } + Unref(i3) + x = Restore(i3) + assert.Nil(t, x) + Unref(i2) + Unref(i1) + assert.Len(t, store, 0) + assert.Len(t, free, blockSize) + assert.Len(t, blocks, 1) + i3 = Save("baz") + assert.Len(t, store, 1) + assert.Len(t, free, blockSize-1) + Clear() + assert.Len(t, store, 0) + assert.Len(t, free, 0) + assert.Len(t, blocks, 0) +} + +func TestPointerIndexing(t *testing.T) { + t.Cleanup(Clear) + assert.Len(t, store, 0) + assert.Len(t, free, 0) + assert.Len(t, blocks, 0) + + i1 := Save("foo") + i2 := Save("bar") + _ = Save("baz") + _ = Save("wibble") + _ = Save("wabble") + assert.Len(t, store, 5) + assert.Len(t, free, blockSize-5) + + // Check that when we remove the first items inserted into the map there are + // no subsequent issues + Unref(i1) + Unref(i2) + assert.Len(t, free, blockSize-3) + _ = Save("flim") + ilast := Save("flam") + assert.Len(t, store, 5) + assert.Len(t, free, blockSize-5) + + x := Restore(ilast) + assert.NotNil(t, x) + if s, ok := x.(string); ok { + assert.Equal(t, "flam", s) + } +} + +func TestCallbacksData(t *testing.T) { + t.Cleanup(Clear) + assert.Len(t, store, 0) + assert.Len(t, free, 0) + assert.Len(t, blocks, 0) + + // insert a plain function + i1 := Save(func(v int) int { return v + 1 }) + + // insert a type "containing" a function, note that it doesn't + // actually have a callable function. Users of the type must + // check that themselves + type flup struct { + Stuff int + Junk func(int, int) error + } + i2 := Save(flup{ + Stuff: 55, + }) + + // did we get a function back + x1 := Restore(i1) + if assert.NotNil(t, x1) { + if f, ok := x1.(func(v int) int); ok { + assert.Equal(t, 2, f(1)) + } else { + t.Fatalf("conversion failed") + } + } + + // did we get our data structure back + x2 := Restore(i2) + if assert.NotNil(t, x2) { + if d, ok := x2.(flup); ok { + assert.Equal(t, 55, d.Stuff) + assert.Nil(t, d.Junk) + } else { + t.Fatalf("conversion failed") + } + } +} + +func BenchmarkPointer(t *testing.B) { + t.Cleanup(Clear) + assert.Len(t, store, 0) + assert.Len(t, free, 0) + assert.Len(t, blocks, 0) + const workers = 1000 + var wg sync.WaitGroup + f := func() { + defer wg.Done() + var x interface{} + var i1, i2, i3 unsafe.Pointer + for i := 0; i < t.N/workers; i++ { + i1 = Save("foo") + i2 = Save("bar") + i3 = Save("baz") + x = Restore(i1) + assert.NotNil(t, x) + if s, ok := x.(string); ok { + assert.Equal(t, "foo", s) + } else { + t.Fail() + } + x = Restore(i3) + assert.NotNil(t, x) + if s, ok := x.(string); ok { + assert.Equal(t, "baz", s) + } else { + t.Fail() + } + Unref(i3) + Unref(i2) + Unref(i1) + } + } + for i := 0; i < workers; i++ { + wg.Add(1) + go f() + } + wg.Wait() + assert.Len(t, store, 0) + assert.Len(t, free, len(blocks)*blockSize) +} diff --git a/go.mod b/go.mod new file mode 100644 index 0000000..b0ca437 --- /dev/null +++ b/go.mod @@ -0,0 +1,45 @@ +module github.com/cshum/imagorvideo + +go 1.18 + +require ( + github.com/cshum/imagor v1.0.4-0.20220908104412-0f9aadc97055 + github.com/gabriel-vasile/mimetype v1.4.1 + github.com/stretchr/testify v1.8.0 + go.uber.org/zap v1.23.0 +) + +require ( + cloud.google.com/go v0.104.0 // indirect + cloud.google.com/go/compute v1.7.0 // indirect + cloud.google.com/go/iam v0.3.0 // indirect + cloud.google.com/go/storage v1.26.0 // indirect + github.com/aws/aws-sdk-go v1.44.93 // indirect + github.com/davecgh/go-spew v1.1.1 // indirect + github.com/golang/groupcache v0.0.0-20210331224755-41bb18bfe9da // indirect + github.com/golang/protobuf v1.5.2 // indirect + github.com/google/go-cmp v0.5.8 // indirect + github.com/google/uuid v1.3.0 // indirect + github.com/googleapis/enterprise-certificate-proxy v0.1.0 // indirect + github.com/googleapis/gax-go/v2 v2.4.0 // indirect + github.com/jmespath/go-jmespath v0.4.0 // indirect + github.com/peterbourgon/ff/v3 v3.3.0 // indirect + github.com/pmezard/go-difflib v1.0.0 // indirect + github.com/rs/cors v1.8.2 // indirect + go.opencensus.io v0.23.0 // indirect + go.uber.org/atomic v1.9.0 // indirect + go.uber.org/multierr v1.8.0 // indirect + golang.org/x/image v0.0.0-20220413100746-70e8d0d3baa9 // indirect + golang.org/x/net v0.0.0-20220624214902-1bab6f366d9e // indirect + golang.org/x/oauth2 v0.0.0-20220822191816-0ebed06d0094 // indirect + golang.org/x/sync v0.0.0-20220722155255-886fb9371eb4 // indirect + golang.org/x/sys v0.0.0-20220715151400-c0bba94af5f8 // indirect + golang.org/x/text v0.3.7 // indirect + golang.org/x/xerrors v0.0.0-20220609144429-65e65417b02f // indirect + google.golang.org/api v0.94.0 // indirect + google.golang.org/appengine v1.6.7 // indirect + google.golang.org/genproto v0.0.0-20220822174746-9e6da59bd2fc // indirect + google.golang.org/grpc v1.48.0 // indirect + google.golang.org/protobuf v1.28.1 // indirect + gopkg.in/yaml.v3 v3.0.1 // indirect +) diff --git a/go.sum b/go.sum new file mode 100644 index 0000000..d32633d --- /dev/null +++ b/go.sum @@ -0,0 +1,724 @@ +cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw= +cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU= +cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU= +cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY= 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WithDebug(debug bool) Option { + return func(p *Processor) { + p.Debug = debug + } +} + +func WithLogger(logger *zap.Logger) Option { + return func(p *Processor) { + if logger != nil { + p.Logger = logger + } + } +} + +func WithFallbackImage(image string) Option { + return func(p *Processor) { + p.FallbackImage = image + } +} diff --git a/processor.go b/processor.go new file mode 100644 index 0000000..1aa82e5 --- /dev/null +++ b/processor.go @@ -0,0 +1,137 @@ +package imagorvideo + +import ( + "context" + "github.com/cshum/imagor" + "github.com/cshum/imagor/imagorpath" + "github.com/cshum/imagorvideo/ffmpeg" + "github.com/gabriel-vasile/mimetype" + "go.uber.org/zap" + "io" + "os" + "strings" +) + +type Processor struct { + Logger *zap.Logger + Debug bool + FallbackImage string +} + +func NewProcessor(options ...Option) *Processor { + p := &Processor{ + Logger: zap.NewNop(), + } + for _, option := range options { + option(p) + } + return p +} + +func (p *Processor) Startup(_ context.Context) error { + if p.Debug { + ffmpeg.SetFFmpegLogLevel(ffmpeg.AVLogDebug) + } else { + ffmpeg.SetFFmpegLogLevel(ffmpeg.AVLogError) + } + return nil +} + +func (p *Processor) Shutdown(_ context.Context) error { + return nil +} + +func (p *Processor) Process(ctx context.Context, in *imagor.Blob, params imagorpath.Params, load imagor.LoadFunc) (out *imagor.Blob, err error) { + defer func() { + if err == nil || out != nil { + return + } + if _, ok := err.(imagor.ErrForward); ok { + return + } + // fallback image on error + out = imagor.NewBlobFromBytes(transPixel) + if p.FallbackImage != "" { + if o, e := load(p.FallbackImage); e == nil { + out = o + } + } + }() + var filters imagorpath.Filters + var mime = mimetype.Detect(in.Sniff()).String() + if !strings.HasPrefix(mime, "video/") && + !strings.HasPrefix(mime, "audio/") { + // forward identical for non video nor audio + err = imagor.ErrForward{Params: params} + out = in + return + } + var reader io.ReadCloser + var size int64 + switch mime { + case "video/webm", "video/x-matroska": + // media types that does not require seek + if reader, size, err = in.NewReader(); err != nil { + return + } + default: + if reader, size, err = in.NewReadSeeker(); err != nil { + // write to temp file if read seeker not available + if reader, _, err = in.NewReader(); err != nil { + return + } + var file *os.File + if file, err = os.CreateTemp("", "imagor-"); err != nil { + return + } + var filename = file.Name() + imagor.Defer(ctx, func() { + _ = os.Remove(filename) + p.Logger.Debug("cleanup", zap.String("file", filename)) + }) + if size, err = io.Copy(file, reader); err != nil { + return + } + p.Logger.Debug("temp", + zap.String("file", filename), + zap.Int64("size", size)) + _ = file.Close() + if reader, err = os.Open(filename); err != nil { + return + } + } + } + av, err := ffmpeg.LoadAVContext(ctx, reader, size) + if err != nil { + return + } + meta := av.Metadata() + if params.Meta { + out = imagor.NewBlobFromJsonMarshal(meta) + return + } + switch meta.Orientation { + case 3: + filters = append(filters, imagorpath.Filter{Name: "rotate", Args: "180"}) + case 6: + filters = append(filters, imagorpath.Filter{Name: "rotate", Args: "270"}) + case 8: + filters = append(filters, imagorpath.Filter{Name: "rotate", Args: "90"}) + } + buf, err := av.ExportImage() + if err != nil || len(buf) == 0 { + if err == nil { + err = imagor.ErrUnsupportedFormat + } + return + } + out = imagor.NewBlobFromBytes(buf) + if len(filters) > 0 { + params.Filters = append(filters, params.Filters...) + params.Path = imagorpath.GeneratePath(params) + } + err = imagor.ErrForward{Params: params} + return +} + +var transPixel = []byte("\x47\x49\x46\x38\x39\x61\x01\x00\x01\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00\x21\xF9\x04\x01\x00\x00\x00\x00\x2C\x00\x00\x00\x00\x01\x00\x01\x00\x00\x02\x02\x44\x01\x00\x3B")