yuv4mpeg: split the demuxer and muxer into separate files
This commit is contained in:
Anton Khirnov
parent
3ef6c5264b
commit
e4dc1000d7
@ -355,8 +355,8 @@ OBJS-$(CONFIG_XA_DEMUXER) += xa.o
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OBJS-$(CONFIG_XMV_DEMUXER) += xmv.o
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OBJS-$(CONFIG_XMV_DEMUXER) += xmv.o
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OBJS-$(CONFIG_XWMA_DEMUXER) += xwma.o
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OBJS-$(CONFIG_XWMA_DEMUXER) += xwma.o
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OBJS-$(CONFIG_YOP_DEMUXER) += yop.o
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OBJS-$(CONFIG_YOP_DEMUXER) += yop.o
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OBJS-$(CONFIG_YUV4MPEGPIPE_MUXER) += yuv4mpeg.o
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OBJS-$(CONFIG_YUV4MPEGPIPE_MUXER) += yuv4mpegenc.o
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OBJS-$(CONFIG_YUV4MPEGPIPE_DEMUXER) += yuv4mpeg.o
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OBJS-$(CONFIG_YUV4MPEGPIPE_DEMUXER) += yuv4mpegdec.o
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# external libraries
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# external libraries
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OBJS-$(CONFIG_LIBRTMP) += librtmp.o
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OBJS-$(CONFIG_LIBRTMP) += librtmp.o
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27
libavformat/yuv4mpeg.h
Normal file
27
libavformat/yuv4mpeg.h
Normal file
@ -0,0 +1,27 @@
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/*
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* YUV4MPEG common definitions
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#ifndef AVFORMAT_YUV4MPEG_H
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#define AVFORMAT_YUV4MPEG_H
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#define Y4M_MAGIC "YUV4MPEG2"
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#define Y4M_FRAME_MAGIC "FRAME"
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#endif /* AVFORMAT_YUV4MPEG_H */
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@ -1,5 +1,5 @@
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/*
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/*
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* YUV4MPEG format
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* YUV4MPEG demuxer
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* Copyright (c) 2001, 2002, 2003 Fabrice Bellard
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* Copyright (c) 2001, 2002, 2003 Fabrice Bellard
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*
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*
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* This file is part of Libav.
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* This file is part of Libav.
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@ -19,184 +19,19 @@
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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*/
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#include "libavutil/pixdesc.h"
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#include "avformat.h"
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#include "avformat.h"
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#include "internal.h"
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#include "internal.h"
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#include "yuv4mpeg.h"
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#define Y4M_MAGIC "YUV4MPEG2"
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/* Header size increased to allow room for optional flags */
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#define Y4M_FRAME_MAGIC "FRAME"
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#define MAX_YUV4_HEADER 80
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#define Y4M_LINE_MAX 256
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#define MAX_FRAME_HEADER 80
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struct frame_attributes {
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struct frame_attributes {
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int interlaced_frame;
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int interlaced_frame;
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int top_field_first;
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int top_field_first;
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};
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};
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#if CONFIG_YUV4MPEGPIPE_MUXER
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static int yuv4_generate_header(AVFormatContext *s, char* buf)
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{
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AVStream *st;
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int width, height;
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int raten, rated, aspectn, aspectd, n;
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char inter;
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const char *colorspace = "";
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st = s->streams[0];
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width = st->codec->width;
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height = st->codec->height;
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av_reduce(&raten, &rated, st->codec->time_base.den,
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st->codec->time_base.num, (1UL << 31) - 1);
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aspectn = st->sample_aspect_ratio.num;
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aspectd = st->sample_aspect_ratio.den;
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if (aspectn == 0 && aspectd == 1)
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aspectd = 0; // 0:0 means unknown
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inter = 'p'; /* progressive is the default */
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if (st->codec->coded_frame && st->codec->coded_frame->interlaced_frame)
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inter = st->codec->coded_frame->top_field_first ? 't' : 'b';
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switch (st->codec->pix_fmt) {
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case AV_PIX_FMT_GRAY8:
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colorspace = " Cmono";
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break;
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case AV_PIX_FMT_YUV411P:
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colorspace = " C411 XYSCSS=411";
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break;
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case AV_PIX_FMT_YUV420P:
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switch (st->codec->chroma_sample_location) {
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case AVCHROMA_LOC_TOPLEFT: colorspace = " C420paldv XYSCSS=420PALDV"; break;
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case AVCHROMA_LOC_LEFT: colorspace = " C420mpeg2 XYSCSS=420MPEG2"; break;
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default: colorspace = " C420jpeg XYSCSS=420JPEG"; break;
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}
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break;
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case AV_PIX_FMT_YUV422P:
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colorspace = " C422 XYSCSS=422";
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break;
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case AV_PIX_FMT_YUV444P:
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colorspace = " C444 XYSCSS=444";
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break;
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}
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/* construct stream header, if this is the first frame */
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n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n",
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Y4M_MAGIC, width, height, raten, rated, inter,
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aspectn, aspectd, colorspace);
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return n;
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}
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static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AVStream *st = s->streams[pkt->stream_index];
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AVIOContext *pb = s->pb;
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AVPicture *picture;
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int* first_pkt = s->priv_data;
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int width, height, h_chroma_shift, v_chroma_shift;
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int i;
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char buf2[Y4M_LINE_MAX + 1];
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char buf1[20];
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uint8_t *ptr, *ptr1, *ptr2;
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picture = (AVPicture *)pkt->data;
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/* for the first packet we have to output the header as well */
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if (*first_pkt) {
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*first_pkt = 0;
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if (yuv4_generate_header(s, buf2) < 0) {
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av_log(s, AV_LOG_ERROR,
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"Error. YUV4MPEG stream header write failed.\n");
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return AVERROR(EIO);
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} else {
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avio_write(pb, buf2, strlen(buf2));
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}
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}
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/* construct frame header */
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snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC);
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avio_write(pb, buf1, strlen(buf1));
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width = st->codec->width;
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height = st->codec->height;
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ptr = picture->data[0];
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for (i = 0; i < height; i++) {
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avio_write(pb, ptr, width);
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ptr += picture->linesize[0];
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}
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if (st->codec->pix_fmt != AV_PIX_FMT_GRAY8) {
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// Adjust for smaller Cb and Cr planes
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av_pix_fmt_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift,
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&v_chroma_shift);
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// Shift right, rounding up
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width = -(-width >> h_chroma_shift);
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height = -(-height >> v_chroma_shift);
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ptr1 = picture->data[1];
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ptr2 = picture->data[2];
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for (i = 0; i < height; i++) { /* Cb */
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avio_write(pb, ptr1, width);
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ptr1 += picture->linesize[1];
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}
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for (i = 0; i < height; i++) { /* Cr */
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avio_write(pb, ptr2, width);
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ptr2 += picture->linesize[2];
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}
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}
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return 0;
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}
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static int yuv4_write_header(AVFormatContext *s)
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{
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int *first_pkt = s->priv_data;
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if (s->nb_streams != 1)
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return AVERROR(EIO);
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if (s->streams[0]->codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
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av_log(s, AV_LOG_ERROR, "ERROR: Only rawvideo supported.\n");
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return AVERROR_INVALIDDATA;
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}
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if (s->streams[0]->codec->pix_fmt == AV_PIX_FMT_YUV411P) {
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av_log(s, AV_LOG_ERROR, "Warning: generating rarely used 4:1:1 YUV "
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"stream, some mjpegtools might not work.\n");
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} else if ((s->streams[0]->codec->pix_fmt != AV_PIX_FMT_YUV420P) &&
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(s->streams[0]->codec->pix_fmt != AV_PIX_FMT_YUV422P) &&
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(s->streams[0]->codec->pix_fmt != AV_PIX_FMT_GRAY8) &&
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(s->streams[0]->codec->pix_fmt != AV_PIX_FMT_YUV444P)) {
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av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg only handles yuv444p, "
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"yuv422p, yuv420p, yuv411p and gray pixel formats. "
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"Use -pix_fmt to select one.\n");
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return AVERROR(EIO);
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}
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*first_pkt = 1;
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return 0;
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}
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AVOutputFormat ff_yuv4mpegpipe_muxer = {
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.name = "yuv4mpegpipe",
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.long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
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.mime_type = "",
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.extensions = "y4m",
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.priv_data_size = sizeof(int),
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.audio_codec = AV_CODEC_ID_NONE,
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.video_codec = AV_CODEC_ID_RAWVIDEO,
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.write_header = yuv4_write_header,
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.write_packet = yuv4_write_packet,
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.flags = AVFMT_RAWPICTURE,
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};
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#endif
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/* Header size increased to allow room for optional flags */
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#define MAX_YUV4_HEADER 80
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#define MAX_FRAME_HEADER 80
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static int yuv4_read_header(AVFormatContext *s)
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static int yuv4_read_header(AVFormatContext *s)
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{
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{
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char header[MAX_YUV4_HEADER + 10]; // Include headroom for
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char header[MAX_YUV4_HEADER + 10]; // Include headroom for
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@ -427,7 +262,6 @@ static int yuv4_probe(AVProbeData *pd)
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return 0;
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return 0;
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}
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}
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#if CONFIG_YUV4MPEGPIPE_DEMUXER
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AVInputFormat ff_yuv4mpegpipe_demuxer = {
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AVInputFormat ff_yuv4mpegpipe_demuxer = {
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.name = "yuv4mpegpipe",
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.name = "yuv4mpegpipe",
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.long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
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.long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
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@ -437,4 +271,3 @@ AVInputFormat ff_yuv4mpegpipe_demuxer = {
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.read_packet = yuv4_read_packet,
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.read_packet = yuv4_read_packet,
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.extensions = "y4m",
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.extensions = "y4m",
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};
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};
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#endif
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186
libavformat/yuv4mpegenc.c
Normal file
186
libavformat/yuv4mpegenc.c
Normal file
@ -0,0 +1,186 @@
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/*
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* YUV4MPEG muxer
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* Copyright (c) 2001, 2002, 2003 Fabrice Bellard
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*
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* This file is part of Libav.
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*
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* Libav is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* Libav is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with Libav; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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*/
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#include "libavutil/pixdesc.h"
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#include "avformat.h"
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#include "internal.h"
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#include "yuv4mpeg.h"
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#define Y4M_LINE_MAX 256
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static int yuv4_generate_header(AVFormatContext *s, char* buf)
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{
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AVStream *st;
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int width, height;
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int raten, rated, aspectn, aspectd, n;
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char inter;
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const char *colorspace = "";
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st = s->streams[0];
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width = st->codec->width;
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height = st->codec->height;
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av_reduce(&raten, &rated, st->codec->time_base.den,
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st->codec->time_base.num, (1UL << 31) - 1);
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aspectn = st->sample_aspect_ratio.num;
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aspectd = st->sample_aspect_ratio.den;
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if (aspectn == 0 && aspectd == 1)
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aspectd = 0; // 0:0 means unknown
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inter = 'p'; /* progressive is the default */
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if (st->codec->coded_frame && st->codec->coded_frame->interlaced_frame)
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inter = st->codec->coded_frame->top_field_first ? 't' : 'b';
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switch (st->codec->pix_fmt) {
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case AV_PIX_FMT_GRAY8:
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colorspace = " Cmono";
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break;
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case AV_PIX_FMT_YUV411P:
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colorspace = " C411 XYSCSS=411";
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break;
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case AV_PIX_FMT_YUV420P:
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switch (st->codec->chroma_sample_location) {
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case AVCHROMA_LOC_TOPLEFT: colorspace = " C420paldv XYSCSS=420PALDV"; break;
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case AVCHROMA_LOC_LEFT: colorspace = " C420mpeg2 XYSCSS=420MPEG2"; break;
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default: colorspace = " C420jpeg XYSCSS=420JPEG"; break;
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}
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break;
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case AV_PIX_FMT_YUV422P:
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colorspace = " C422 XYSCSS=422";
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break;
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case AV_PIX_FMT_YUV444P:
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colorspace = " C444 XYSCSS=444";
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break;
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}
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/* construct stream header, if this is the first frame */
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n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n",
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Y4M_MAGIC, width, height, raten, rated, inter,
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aspectn, aspectd, colorspace);
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return n;
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}
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static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
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{
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AVStream *st = s->streams[pkt->stream_index];
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AVIOContext *pb = s->pb;
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AVPicture *picture;
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int* first_pkt = s->priv_data;
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int width, height, h_chroma_shift, v_chroma_shift;
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int i;
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char buf2[Y4M_LINE_MAX + 1];
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char buf1[20];
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uint8_t *ptr, *ptr1, *ptr2;
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||||||
|
|
||||||
|
picture = (AVPicture *)pkt->data;
|
||||||
|
|
||||||
|
/* for the first packet we have to output the header as well */
|
||||||
|
if (*first_pkt) {
|
||||||
|
*first_pkt = 0;
|
||||||
|
if (yuv4_generate_header(s, buf2) < 0) {
|
||||||
|
av_log(s, AV_LOG_ERROR,
|
||||||
|
"Error. YUV4MPEG stream header write failed.\n");
|
||||||
|
return AVERROR(EIO);
|
||||||
|
} else {
|
||||||
|
avio_write(pb, buf2, strlen(buf2));
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
/* construct frame header */
|
||||||
|
|
||||||
|
snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC);
|
||||||
|
avio_write(pb, buf1, strlen(buf1));
|
||||||
|
|
||||||
|
width = st->codec->width;
|
||||||
|
height = st->codec->height;
|
||||||
|
|
||||||
|
ptr = picture->data[0];
|
||||||
|
for (i = 0; i < height; i++) {
|
||||||
|
avio_write(pb, ptr, width);
|
||||||
|
ptr += picture->linesize[0];
|
||||||
|
}
|
||||||
|
|
||||||
|
if (st->codec->pix_fmt != AV_PIX_FMT_GRAY8) {
|
||||||
|
// Adjust for smaller Cb and Cr planes
|
||||||
|
av_pix_fmt_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift,
|
||||||
|
&v_chroma_shift);
|
||||||
|
// Shift right, rounding up
|
||||||
|
width = -(-width >> h_chroma_shift);
|
||||||
|
height = -(-height >> v_chroma_shift);
|
||||||
|
|
||||||
|
ptr1 = picture->data[1];
|
||||||
|
ptr2 = picture->data[2];
|
||||||
|
for (i = 0; i < height; i++) { /* Cb */
|
||||||
|
avio_write(pb, ptr1, width);
|
||||||
|
ptr1 += picture->linesize[1];
|
||||||
|
}
|
||||||
|
for (i = 0; i < height; i++) { /* Cr */
|
||||||
|
avio_write(pb, ptr2, width);
|
||||||
|
ptr2 += picture->linesize[2];
|
||||||
|
}
|
||||||
|
}
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
static int yuv4_write_header(AVFormatContext *s)
|
||||||
|
{
|
||||||
|
int *first_pkt = s->priv_data;
|
||||||
|
|
||||||
|
if (s->nb_streams != 1)
|
||||||
|
return AVERROR(EIO);
|
||||||
|
|
||||||
|
if (s->streams[0]->codec->codec_id != AV_CODEC_ID_RAWVIDEO) {
|
||||||
|
av_log(s, AV_LOG_ERROR, "ERROR: Only rawvideo supported.\n");
|
||||||
|
return AVERROR_INVALIDDATA;
|
||||||
|
}
|
||||||
|
|
||||||
|
if (s->streams[0]->codec->pix_fmt == AV_PIX_FMT_YUV411P) {
|
||||||
|
av_log(s, AV_LOG_ERROR, "Warning: generating rarely used 4:1:1 YUV "
|
||||||
|
"stream, some mjpegtools might not work.\n");
|
||||||
|
} else if ((s->streams[0]->codec->pix_fmt != AV_PIX_FMT_YUV420P) &&
|
||||||
|
(s->streams[0]->codec->pix_fmt != AV_PIX_FMT_YUV422P) &&
|
||||||
|
(s->streams[0]->codec->pix_fmt != AV_PIX_FMT_GRAY8) &&
|
||||||
|
(s->streams[0]->codec->pix_fmt != AV_PIX_FMT_YUV444P)) {
|
||||||
|
av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg only handles yuv444p, "
|
||||||
|
"yuv422p, yuv420p, yuv411p and gray pixel formats. "
|
||||||
|
"Use -pix_fmt to select one.\n");
|
||||||
|
return AVERROR(EIO);
|
||||||
|
}
|
||||||
|
|
||||||
|
*first_pkt = 1;
|
||||||
|
return 0;
|
||||||
|
}
|
||||||
|
|
||||||
|
AVOutputFormat ff_yuv4mpegpipe_muxer = {
|
||||||
|
.name = "yuv4mpegpipe",
|
||||||
|
.long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
|
||||||
|
.mime_type = "",
|
||||||
|
.extensions = "y4m",
|
||||||
|
.priv_data_size = sizeof(int),
|
||||||
|
.audio_codec = AV_CODEC_ID_NONE,
|
||||||
|
.video_codec = AV_CODEC_ID_RAWVIDEO,
|
||||||
|
.write_header = yuv4_write_header,
|
||||||
|
.write_packet = yuv4_write_packet,
|
||||||
|
.flags = AVFMT_RAWPICTURE,
|
||||||
|
};
|
||||||
Loading…
x
Reference in New Issue
Block a user