dscho
20 years ago
parent
c7730d9bad
commit
00901a2eb9
@ -0,0 +1,426 @@
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/*
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* Simple movie writer for vnc; based on Libavformat API example from FFMPEG
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*
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* Copyright (c) 2003 Fabrice Bellard, 2004 Johannes E. Schindelin
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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#include <math.h>
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#ifndef M_PI
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#define M_PI 3.1415926535897931
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#endif
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#include "avformat.h"
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#include <rfb/rfbclient.h>
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/* 5 seconds stream duration */
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//#define STREAM_DURATION 5.0
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#define STREAM_FRAME_RATE 25 /* 25 images/s */
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//#define STREAM_NB_FRAMES ((int)(STREAM_DURATION * STREAM_FRAME_RATE))
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/**************************************************************/
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/* video output */
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AVFrame *picture, *tmp_picture;
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uint8_t *video_outbuf;
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int frame_count, video_outbuf_size;
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/* add a video output stream */
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AVStream *add_video_stream(AVFormatContext *oc, int codec_id, int w, int h)
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{
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AVCodecContext *c;
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AVStream *st;
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st = av_new_stream(oc, 0);
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if (!st) {
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fprintf(stderr, "Could not alloc stream\n");
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exit(1);
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}
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c = &st->codec;
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c->codec_id = codec_id;
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c->codec_type = CODEC_TYPE_VIDEO;
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/* put sample parameters */
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c->bit_rate = 400000;
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/* resolution must be a multiple of two */
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c->width = w;
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c->height = h;
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/* frames per second */
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c->frame_rate = STREAM_FRAME_RATE;
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c->frame_rate_base = 1;
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c->gop_size = 12; /* emit one intra frame every twelve frames at most */
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if (c->codec_id == CODEC_ID_MPEG2VIDEO) {
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/* just for testing, we also add B frames */
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c->max_b_frames = 2;
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}
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if (c->codec_id == CODEC_ID_MPEG1VIDEO){
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/* needed to avoid using macroblocks in which some coeffs overflow
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this doesnt happen with normal video, it just happens here as the
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motion of the chroma plane doesnt match the luma plane */
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c->mb_decision=2;
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}
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// some formats want stream headers to be seperate
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if(!strcmp(oc->oformat->name, "mp4") || !strcmp(oc->oformat->name, "mov") || !strcmp(oc->oformat->name, "3gp"))
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c->flags |= CODEC_FLAG_GLOBAL_HEADER;
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return st;
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}
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AVFrame *alloc_picture(int pix_fmt, int width, int height)
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{
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AVFrame *picture;
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uint8_t *picture_buf;
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int size;
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picture = avcodec_alloc_frame();
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if (!picture)
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return NULL;
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size = avpicture_get_size(pix_fmt, width, height);
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picture_buf = malloc(size);
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if (!picture_buf) {
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av_free(picture);
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return NULL;
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}
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avpicture_fill((AVPicture *)picture, picture_buf,
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pix_fmt, width, height);
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return picture;
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}
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void open_video(AVFormatContext *oc, AVStream *st)
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{
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AVCodec *codec;
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AVCodecContext *c;
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c = &st->codec;
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/* find the video encoder */
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codec = avcodec_find_encoder(c->codec_id);
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if (!codec) {
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fprintf(stderr, "codec not found\n");
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exit(1);
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}
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/* open the codec */
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if (avcodec_open(c, codec) < 0) {
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fprintf(stderr, "could not open codec\n");
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exit(1);
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}
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video_outbuf = NULL;
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if (!(oc->oformat->flags & AVFMT_RAWPICTURE)) {
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/* allocate output buffer */
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/* XXX: API change will be done */
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video_outbuf_size = 200000;
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video_outbuf = malloc(video_outbuf_size);
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}
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/* allocate the encoded raw picture */
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picture = alloc_picture(c->pix_fmt, c->width, c->height);
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if (!picture) {
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fprintf(stderr, "Could not allocate picture\n");
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exit(1);
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}
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/* if the output format is not RGB565, then a temporary RGB565
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picture is needed too. It is then converted to the required
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output format */
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tmp_picture = NULL;
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if (c->pix_fmt != PIX_FMT_RGB565) {
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tmp_picture = alloc_picture(PIX_FMT_RGB565, c->width, c->height);
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if (!tmp_picture) {
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fprintf(stderr, "Could not allocate temporary picture\n");
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exit(1);
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}
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}
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}
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void write_video_frame(AVFormatContext *oc, AVStream *st)
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{
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int out_size, ret;
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AVCodecContext *c;
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AVFrame *picture_ptr;
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c = &st->codec;
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if (c->pix_fmt != PIX_FMT_RGB565) {
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/* as we only generate a RGB565 picture, we must convert it
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to the codec pixel format if needed */
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// TODO
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//fill_yuv_image(tmp_picture, frame_count, c->width, c->height);
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img_convert((AVPicture *)picture, c->pix_fmt,
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(AVPicture *)tmp_picture, PIX_FMT_RGB565,
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c->width, c->height);
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} else {
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// TODO: fill_yuv_image(picture, frame_count, c->width, c->height);
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}
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picture_ptr = picture;
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if (oc->oformat->flags & AVFMT_RAWPICTURE) {
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/* raw video case. The API will change slightly in the near
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futur for that */
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AVPacket pkt;
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av_init_packet(&pkt);
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pkt.flags |= PKT_FLAG_KEY;
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pkt.stream_index= st->index;
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pkt.data= (uint8_t *)picture_ptr;
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pkt.size= sizeof(AVPicture);
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ret = av_write_frame(oc, &pkt);
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} else {
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/* encode the image */
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out_size = avcodec_encode_video(c, video_outbuf, video_outbuf_size, picture_ptr);
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/* if zero size, it means the image was buffered */
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if (out_size != 0) {
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AVPacket pkt;
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av_init_packet(&pkt);
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pkt.pts= c->coded_frame->pts;
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if(c->coded_frame->key_frame)
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pkt.flags |= PKT_FLAG_KEY;
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pkt.stream_index= st->index;
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pkt.data= video_outbuf;
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pkt.size= out_size;
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/* write the compressed frame in the media file */
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ret = av_write_frame(oc, &pkt);
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} else {
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ret = 0;
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}
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}
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if (ret != 0) {
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fprintf(stderr, "Error while writing video frame\n");
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exit(1);
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}
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frame_count++;
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}
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void close_video(AVFormatContext *oc, AVStream *st)
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{
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avcodec_close(&st->codec);
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av_free(picture->data[0]);
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av_free(picture);
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if (tmp_picture) {
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av_free(tmp_picture->data[0]);
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av_free(tmp_picture);
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}
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av_free(video_outbuf);
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}
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static const char *filename;
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static AVOutputFormat *fmt;
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static AVFormatContext *oc;
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static AVStream *video_st;
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static double video_pts;
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static int movie_open(int w, int h) {
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if (fmt->video_codec != CODEC_ID_NONE) {
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video_st = add_video_stream(oc, fmt->video_codec, w, h);
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} else
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return 1;
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/* set the output parameters (must be done even if no
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parameters). */
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if (av_set_parameters(oc, NULL) < 0) {
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fprintf(stderr, "Invalid output format parameters\n");
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return 2;
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}
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dump_format(oc, 0, filename, 1);
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/* now that all the parameters are set, we can open the audio and
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video codecs and allocate the necessary encode buffers */
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if (video_st)
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open_video(oc, video_st);
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/* open the output file, if needed */
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if (!(fmt->flags & AVFMT_NOFILE)) {
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if (url_fopen(&oc->pb, filename, URL_WRONLY) < 0) {
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fprintf(stderr, "Could not open '%s'\n", filename);
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return 3;
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}
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}
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/* write the stream header, if any */
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av_write_header(oc);
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return 0;
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}
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static int movie_close() {
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int i;
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/* close each codec */
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close_video(oc, video_st);
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/* write the trailer, if any */
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av_write_trailer(oc);
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/* free the streams */
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for(i = 0; i < oc->nb_streams; i++) {
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av_freep(&oc->streams[i]);
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}
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if (!(fmt->flags & AVFMT_NOFILE)) {
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/* close the output file */
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url_fclose(&oc->pb);
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}
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/* free the stream */
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av_free(oc);
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}
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static rfbBool quit=FALSE;
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static void signal_handler(int signal) {
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fprintf(stderr,"Cleaning up.\n");
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quit=TRUE;
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}
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/**************************************************************/
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/* VNC callback functions */
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static rfbBool resize(rfbClient* client) {
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static rfbBool first=TRUE;
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if(!first) {
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movie_close();
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perror("I don't know yet how to change resolutions!\n");
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}
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movie_open(client->width, client->height);
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signal(SIGINT,signal_handler);
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if(tmp_picture)
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client->frameBuffer=tmp_picture->data[0];
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else
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client->frameBuffer=picture->data[0];
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return TRUE;
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}
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static void update(rfbClient* client,int x,int y,int w,int h) {
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}
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/**************************************************************/
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/* media file output */
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int main(int argc, char **argv)
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{
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time_t stop=0;
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rfbClient* client;
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int i;
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/* get a vnc client structure (don't connect yet). */
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client = rfbGetClient(5,3,2);
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client->format.redShift=11; client->format.redMax=31;
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client->format.greenShift=5; client->format.greenMax=63;
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client->format.blueShift=0; client->format.blueMax=31;
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/* initialize libavcodec, and register all codecs and formats */
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av_register_all();
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if(!strncmp(argv[argc-1],":",1) ||
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!strncmp(argv[argc-1],"127.0.0.1",9) ||
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!strncmp(argv[argc-1],"localhost",9))
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client->appData.encodingsString="raw";
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i=1;
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filename=0;
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while(i<argc) {
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if(argc>i+1 && !strcmp("-o",argv[i])) {
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filename=argv[2];
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i+=2;
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} else if(argc>i+1 && !strcmp("-t",argv[i])) {
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stop=time(0)+atoi(argv[i+1]);
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i+=2;
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} else if(argc>i+1 && !strcmp("-encodings",argv[i])) {
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client->appData.encodingsString=argv[i+1];
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i+=2;
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} else
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break;
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}
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if (argc != i+1) {
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printf("usage: %s [-o output_file] [-t seconds] server:port\n"
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"Shoot a movie from a VNC server.\n", argv[0]);
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exit(1);
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}
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/* auto detect the output format from the name. default is
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mpeg. */
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fmt = filename?guess_format(NULL, filename, NULL):0;
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if (!fmt) {
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printf("Could not deduce output format from file extension: using MPEG.\n");
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fmt = guess_format("mpeg", NULL, NULL);
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}
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if (!fmt) {
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fprintf(stderr, "Could not find suitable output format\n");
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exit(1);
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}
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/* allocate the output media context */
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oc = av_alloc_format_context();
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if (!oc) {
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fprintf(stderr, "Memory error\n");
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exit(1);
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}
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oc->oformat = fmt;
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snprintf(oc->filename, sizeof(oc->filename), "%s", filename);
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/* add the audio and video streams using the default format codecs
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and initialize the codecs */
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video_st = NULL;
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/* purge the arguments not concerning VNC */
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argv[1]=argv[i];
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argc=2;
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client->MallocFrameBuffer=resize;
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client->GotFrameBufferUpdate=update;
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if(!rfbInitClient(client,&argc,argv)) {
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fprintf(stderr,"Could not connect to server!\n");
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return 1;
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}
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/* main loop */
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while(!quit) {
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int i=WaitForMessage(client,2000);
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if(i<0) {
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movie_close();
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return 0;
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}
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if(i)
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HandleRFBServerMessage(client);
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else {
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/* compute current audio and video time */
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video_pts = (double)video_st->pts.val * video_st->time_base.num / video_st->time_base.den;
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/* write interleaved audio and video frames */
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write_video_frame(oc, video_st);
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}
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if(stop!=0 && stop<time(0))
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break;
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}
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movie_close();
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return 0;
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}
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