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Modularize presets for OpenCV and FFmpeg (pull #681)
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,166 @@ | ||
| import java.io.*; | ||
| import org.bytedeco.javacpp.*; | ||
| import org.bytedeco.ffmpeg.avcodec.*; | ||
| import org.bytedeco.ffmpeg.avformat.*; | ||
| import org.bytedeco.ffmpeg.avutil.*; | ||
| import org.bytedeco.ffmpeg.swscale.*; | ||
| import static org.bytedeco.ffmpeg.global.avcodec.*; | ||
| import static org.bytedeco.ffmpeg.global.avformat.*; | ||
| import static org.bytedeco.ffmpeg.global.avutil.*; | ||
| import static org.bytedeco.ffmpeg.global.swscale.*; | ||
|
|
||
| public class ReadFewFrame { | ||
| /** | ||
| * Write image data using simple image format ppm | ||
| * @see https://en.wikipedia.org/wiki/Netpbm_format | ||
| */ | ||
| static void save_frame(AVFrame pFrame, int width, int height, int f_idx) throws IOException { | ||
| // Open file | ||
| String szFilename = String.format("frame%d_.ppm", f_idx); | ||
| OutputStream pFile = new FileOutputStream(szFilename); | ||
|
|
||
| // Write header | ||
| pFile.write(String.format("P6\n%d %d\n255\n", width, height).getBytes()); | ||
|
|
||
| // Write pixel data | ||
| BytePointer data = pFrame.data(0); | ||
| byte[] bytes = new byte[width * 3]; | ||
| int l = pFrame.linesize(0); | ||
| for(int y = 0; y < height; y++) { | ||
| data.position(y * l).get(bytes); | ||
| pFile.write(bytes); | ||
| } | ||
|
|
||
| // Close file | ||
| pFile.close(); | ||
| } | ||
|
|
||
| public static void main(String[] args) throws Exception { | ||
| System.out.println("Read few frame and write to image"); | ||
| if (args.length < 1) { | ||
| System.out.println("Missing input video file"); | ||
| System.exit(-1); | ||
| } | ||
| int ret = -1, i = 0, v_stream_idx = -1; | ||
| String vf_path = args[0]; | ||
| AVFormatContext fmt_ctx = new AVFormatContext(null); | ||
| AVPacket pkt = new AVPacket(); | ||
|
|
||
| ret = avformat_open_input(fmt_ctx, vf_path, null, null); | ||
| if (ret < 0) { | ||
| System.out.printf("Open video file %s failed \n", vf_path); | ||
| throw new IllegalStateException(); | ||
| } | ||
|
|
||
| // i dont know but without this function, sws_getContext does not work | ||
| if (avformat_find_stream_info(fmt_ctx, (PointerPointer)null) < 0) { | ||
| System.exit(-1); | ||
| } | ||
|
|
||
| av_dump_format(fmt_ctx, 0, args[0], 0); | ||
|
|
||
| for (i = 0; i < fmt_ctx.nb_streams(); i++) { | ||
| if (fmt_ctx.streams(i).codecpar().codec_type() == AVMEDIA_TYPE_VIDEO) { | ||
| v_stream_idx = i; | ||
| break; | ||
| } | ||
| } | ||
| if (v_stream_idx == -1) { | ||
| System.out.println("Cannot find video stream"); | ||
| throw new IllegalStateException(); | ||
| } else { | ||
| System.out.printf("Video stream %d with resolution %dx%d\n", v_stream_idx, | ||
| fmt_ctx.streams(i).codecpar().width(), | ||
| fmt_ctx.streams(i).codecpar().height()); | ||
| } | ||
|
|
||
| AVCodecContext codec_ctx = avcodec_alloc_context3(null); | ||
| avcodec_parameters_to_context(codec_ctx, fmt_ctx.streams(v_stream_idx).codecpar()); | ||
|
|
||
| AVCodec codec = avcodec_find_decoder(codec_ctx.codec_id()); | ||
| if (codec == null) { | ||
| System.out.println("Unsupported codec for video file"); | ||
| throw new IllegalStateException(); | ||
| } | ||
| ret = avcodec_open2(codec_ctx, codec, (PointerPointer)null); | ||
| if (ret < 0) { | ||
| System.out.println("Can not open codec"); | ||
| throw new IllegalStateException(); | ||
| } | ||
|
|
||
| AVFrame frm = av_frame_alloc(); | ||
|
|
||
| // Allocate an AVFrame structure | ||
| AVFrame pFrameRGB = av_frame_alloc(); | ||
| if (pFrameRGB == null) { | ||
| System.exit(-1); | ||
| } | ||
|
|
||
| // Determine required buffer size and allocate buffer | ||
| int numBytes = av_image_get_buffer_size(AV_PIX_FMT_RGB24, codec_ctx.width(), | ||
| codec_ctx.height(), 1); | ||
| BytePointer buffer = new BytePointer(av_malloc(numBytes)); | ||
|
|
||
| SwsContext sws_ctx = sws_getContext( | ||
| codec_ctx.width(), | ||
| codec_ctx.height(), | ||
| codec_ctx.pix_fmt(), | ||
| codec_ctx.width(), | ||
| codec_ctx.height(), | ||
| AV_PIX_FMT_RGB24, | ||
| SWS_BILINEAR, | ||
| null, | ||
| null, | ||
| (DoublePointer)null | ||
| ); | ||
|
|
||
| if (sws_ctx == null) { | ||
| System.out.println("Can not use sws"); | ||
| throw new IllegalStateException(); | ||
| } | ||
|
|
||
| av_image_fill_arrays(pFrameRGB.data(), pFrameRGB.linesize(), | ||
| buffer, AV_PIX_FMT_RGB24, codec_ctx.width(), codec_ctx.height(), 1); | ||
|
|
||
| i = 0; | ||
| int ret1 = -1, ret2 = -1, fi = -1; | ||
| while (av_read_frame(fmt_ctx, pkt) >= 0) { | ||
| if (pkt.stream_index() == v_stream_idx) { | ||
| ret1 = avcodec_send_packet(codec_ctx, pkt); | ||
| ret2 = avcodec_receive_frame(codec_ctx, frm); | ||
| System.out.printf("ret1 %d ret2 %d\n", ret1, ret2); | ||
| // avcodec_decode_video2(codec_ctx, frm, fi, pkt); | ||
| } | ||
| // if not check ret2, error occur [swscaler @ 0x1cb3c40] bad src image pointers | ||
| // ret2 same as fi | ||
| // if (fi && ++i <= 5) { | ||
| if (ret2 >= 0 && ++i <= 5) { | ||
| sws_scale( | ||
| sws_ctx, | ||
| frm.data(), | ||
| frm.linesize(), | ||
| 0, | ||
| codec_ctx.height(), | ||
| pFrameRGB.data(), | ||
| pFrameRGB.linesize() | ||
| ); | ||
|
|
||
| save_frame(pFrameRGB, codec_ctx.width(), codec_ctx.height(), i); | ||
| // save_frame(frm, codec_ctx.width(), codec_ctx.height(), i); | ||
| } | ||
| av_packet_unref(pkt); | ||
| if (i >= 5) { | ||
| break; | ||
| } | ||
| } | ||
|
|
||
| av_frame_free(frm); | ||
|
|
||
| avcodec_close(codec_ctx); | ||
| avcodec_free_context(codec_ctx); | ||
|
|
||
| avformat_close_input(fmt_ctx); | ||
| System.out.println("Shutdown"); | ||
| System.exit(0); | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,19 @@ | ||
| <project> | ||
| <modelVersion>4.0.0</modelVersion> | ||
| <groupId>org.bytedeco.ffmpeg</groupId> | ||
| <artifactId>readfewframe</artifactId> | ||
| <version>1.5-SNAPSHOT</version> | ||
| <properties> | ||
| <exec.mainClass>ReadFewFrame</exec.mainClass> | ||
| </properties> | ||
| <dependencies> | ||
| <dependency> | ||
| <groupId>org.bytedeco</groupId> | ||
| <artifactId>ffmpeg-platform</artifactId> | ||
| <version>4.1-1.5-SNAPSHOT</version> | ||
| </dependency> | ||
| </dependencies> | ||
| <build> | ||
| <sourceDirectory>.</sourceDirectory> | ||
| </build> | ||
| </project> |
88 changes: 88 additions & 0 deletions
88
ffmpeg/src/gen/java/org/bytedeco/ffmpeg/avcodec/AVBSFContext.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| // Targeted by JavaCPP version 1.5-SNAPSHOT: DO NOT EDIT THIS FILE | ||
|
|
||
| package org.bytedeco.ffmpeg.avcodec; | ||
|
|
||
| import java.nio.*; | ||
| import org.bytedeco.javacpp.*; | ||
| import org.bytedeco.javacpp.annotation.*; | ||
|
|
||
| import org.bytedeco.ffmpeg.avutil.*; | ||
| import static org.bytedeco.ffmpeg.global.avutil.*; | ||
| import org.bytedeco.ffmpeg.swresample.*; | ||
| import static org.bytedeco.ffmpeg.global.swresample.*; | ||
|
|
||
| import static org.bytedeco.ffmpeg.global.avcodec.*; | ||
|
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||
|
|
||
| /** | ||
| * The bitstream filter state. | ||
| * | ||
| * This struct must be allocated with av_bsf_alloc() and freed with | ||
| * av_bsf_free(). | ||
| * | ||
| * The fields in the struct will only be changed (by the caller or by the | ||
| * filter) as described in their documentation, and are to be considered | ||
| * immutable otherwise. | ||
| */ | ||
| @Properties(inherit = org.bytedeco.ffmpeg.presets.avcodec.class) | ||
| public class AVBSFContext extends Pointer { | ||
| static { Loader.load(); } | ||
| /** Default native constructor. */ | ||
| public AVBSFContext() { super((Pointer)null); allocate(); } | ||
| /** Native array allocator. Access with {@link Pointer#position(long)}. */ | ||
| public AVBSFContext(long size) { super((Pointer)null); allocateArray(size); } | ||
| /** Pointer cast constructor. Invokes {@link Pointer#Pointer(Pointer)}. */ | ||
| public AVBSFContext(Pointer p) { super(p); } | ||
| private native void allocate(); | ||
| private native void allocateArray(long size); | ||
| @Override public AVBSFContext position(long position) { | ||
| return (AVBSFContext)super.position(position); | ||
| } | ||
|
|
||
| /** | ||
| * A class for logging and AVOptions | ||
| */ | ||
| @MemberGetter public native @Const AVClass av_class(); | ||
|
|
||
| /** | ||
| * The bitstream filter this context is an instance of. | ||
| */ | ||
| @MemberGetter public native @Const AVBitStreamFilter filter(); | ||
|
|
||
| /** | ||
| * Opaque libavcodec internal data. Must not be touched by the caller in any | ||
| * way. | ||
| */ | ||
| public native AVBSFInternal internal(); public native AVBSFContext internal(AVBSFInternal internal); | ||
|
|
||
| /** | ||
| * Opaque filter-specific private data. If filter->priv_class is non-NULL, | ||
| * this is an AVOptions-enabled struct. | ||
| */ | ||
| public native Pointer priv_data(); public native AVBSFContext priv_data(Pointer priv_data); | ||
|
|
||
| /** | ||
| * Parameters of the input stream. This field is allocated in | ||
| * av_bsf_alloc(), it needs to be filled by the caller before | ||
| * av_bsf_init(). | ||
| */ | ||
| public native AVCodecParameters par_in(); public native AVBSFContext par_in(AVCodecParameters par_in); | ||
|
|
||
| /** | ||
| * Parameters of the output stream. This field is allocated in | ||
| * av_bsf_alloc(), it is set by the filter in av_bsf_init(). | ||
| */ | ||
| public native AVCodecParameters par_out(); public native AVBSFContext par_out(AVCodecParameters par_out); | ||
|
|
||
| /** | ||
| * The timebase used for the timestamps of the input packets. Set by the | ||
| * caller before av_bsf_init(). | ||
| */ | ||
| public native @ByRef AVRational time_base_in(); public native AVBSFContext time_base_in(AVRational time_base_in); | ||
|
|
||
| /** | ||
| * The timebase used for the timestamps of the output packets. Set by the | ||
| * filter in av_bsf_init(). | ||
| */ | ||
| public native @ByRef AVRational time_base_out(); public native AVBSFContext time_base_out(AVRational time_base_out); | ||
| } |
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