mirror of
https://git.ffmpeg.org/ffmpeg.git
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308 lines
9.6 KiB
C
308 lines
9.6 KiB
C
/*
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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 FFmpeg.
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*
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* FFmpeg 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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* FFmpeg 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 FFmpeg; 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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// TODO: should be avg_frame_rate
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av_reduce(&raten, &rated, st->time_base.den,
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st->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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switch (st->codec->field_order) {
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case AV_FIELD_TB:
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case AV_FIELD_TT: inter = 't'; break;
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case AV_FIELD_BT:
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case AV_FIELD_BB: inter = 'b'; break;
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default: inter = 'p'; break;
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}
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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_GRAY16:
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colorspace = " Cmono16";
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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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case AV_PIX_FMT_YUV420P9:
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colorspace = " C420p9 XYSCSS=420P9";
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break;
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case AV_PIX_FMT_YUV422P9:
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colorspace = " C422p9 XYSCSS=422P9";
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break;
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case AV_PIX_FMT_YUV444P9:
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colorspace = " C444p9 XYSCSS=444P9";
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break;
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case AV_PIX_FMT_YUV420P10:
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colorspace = " C420p10 XYSCSS=420P10";
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break;
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case AV_PIX_FMT_YUV422P10:
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colorspace = " C422p10 XYSCSS=422P10";
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break;
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case AV_PIX_FMT_YUV444P10:
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colorspace = " C444p10 XYSCSS=444P10";
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break;
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case AV_PIX_FMT_YUV420P12:
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colorspace = " C420p12 XYSCSS=420P12";
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break;
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case AV_PIX_FMT_YUV422P12:
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colorspace = " C422p12 XYSCSS=422P12";
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break;
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case AV_PIX_FMT_YUV444P12:
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colorspace = " C444p12 XYSCSS=444P12";
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break;
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case AV_PIX_FMT_YUV420P14:
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colorspace = " C420p14 XYSCSS=420P14";
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break;
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case AV_PIX_FMT_YUV422P14:
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colorspace = " C422p14 XYSCSS=422P14";
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break;
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case AV_PIX_FMT_YUV444P14:
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colorspace = " C444p14 XYSCSS=444P14";
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break;
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case AV_PIX_FMT_YUV420P16:
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colorspace = " C420p16 XYSCSS=420P16";
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break;
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case AV_PIX_FMT_YUV422P16:
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colorspace = " C422p16 XYSCSS=422P16";
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break;
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case AV_PIX_FMT_YUV444P16:
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colorspace = " C444p16 XYSCSS=444P16";
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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, picture_tmp;
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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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memcpy(&picture_tmp, pkt->data, sizeof(AVPicture));
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picture = &picture_tmp;
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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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switch (st->codec->pix_fmt) {
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case AV_PIX_FMT_GRAY8:
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case AV_PIX_FMT_YUV411P:
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case AV_PIX_FMT_YUV420P:
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case AV_PIX_FMT_YUV422P:
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case AV_PIX_FMT_YUV444P:
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break;
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case AV_PIX_FMT_GRAY16:
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case AV_PIX_FMT_YUV420P9:
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case AV_PIX_FMT_YUV422P9:
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case AV_PIX_FMT_YUV444P9:
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case AV_PIX_FMT_YUV420P10:
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case AV_PIX_FMT_YUV422P10:
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case AV_PIX_FMT_YUV444P10:
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case AV_PIX_FMT_YUV420P12:
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case AV_PIX_FMT_YUV422P12:
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case AV_PIX_FMT_YUV444P12:
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case AV_PIX_FMT_YUV420P14:
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case AV_PIX_FMT_YUV422P14:
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case AV_PIX_FMT_YUV444P14:
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case AV_PIX_FMT_YUV420P16:
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case AV_PIX_FMT_YUV422P16:
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case AV_PIX_FMT_YUV444P16:
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width *= 2;
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break;
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default:
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av_log(s, AV_LOG_ERROR, "The pixel format '%s' is not supported.\n",
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av_get_pix_fmt_name(st->codec->pix_fmt));
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return AVERROR(EINVAL);
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}
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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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st->codec->pix_fmt != AV_PIX_FMT_GRAY16) {
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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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width = FF_CEIL_RSHIFT(width, h_chroma_shift);
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height = FF_CEIL_RSHIFT(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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switch (s->streams[0]->codec->pix_fmt) {
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case AV_PIX_FMT_YUV411P:
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av_log(s, AV_LOG_WARNING, "Warning: generating rarely used 4:1:1 YUV "
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"stream, some mjpegtools might not work.\n");
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break;
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case AV_PIX_FMT_GRAY8:
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case AV_PIX_FMT_GRAY16:
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case AV_PIX_FMT_YUV420P:
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case AV_PIX_FMT_YUV422P:
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case AV_PIX_FMT_YUV444P:
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break;
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case AV_PIX_FMT_YUV420P9:
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case AV_PIX_FMT_YUV422P9:
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case AV_PIX_FMT_YUV444P9:
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case AV_PIX_FMT_YUV420P10:
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case AV_PIX_FMT_YUV422P10:
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case AV_PIX_FMT_YUV444P10:
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case AV_PIX_FMT_YUV420P12:
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case AV_PIX_FMT_YUV422P12:
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case AV_PIX_FMT_YUV444P12:
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case AV_PIX_FMT_YUV420P14:
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case AV_PIX_FMT_YUV422P14:
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case AV_PIX_FMT_YUV444P14:
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case AV_PIX_FMT_YUV420P16:
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case AV_PIX_FMT_YUV422P16:
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case AV_PIX_FMT_YUV444P16:
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if (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
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av_log(s, AV_LOG_ERROR, "'%s' is not a official yuv4mpegpipe pixel format. "
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"Use '-strict -1' to encode to this pixel format.\n",
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av_get_pix_fmt_name(s->streams[0]->codec->pix_fmt));
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return AVERROR(EINVAL);
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}
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av_log(s, AV_LOG_WARNING, "Warning: generating non standard YUV stream. "
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"Mjpegtools will not work.\n");
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break;
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default:
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av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg can only handle "
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"yuv444p, yuv422p, yuv420p, yuv411p and gray8 pixel formats. "
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"And using 'strict -1' also yuv444p9, yuv422p9, yuv420p9, "
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"yuv444p10, yuv422p10, yuv420p10, "
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"yuv444p12, yuv422p12, yuv420p12, "
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"yuv444p14, yuv422p14, yuv420p14, "
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"yuv444p16, yuv422p16, yuv420p16 "
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"and gray16 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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.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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