610 lines
21 KiB
C
610 lines
21 KiB
C
/*
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* YUV4MPEG format
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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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#define Y4M_MAGIC "YUV4MPEG2"
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#define Y4M_FRAME_MAGIC "FRAME"
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#define Y4M_LINE_MAX 256
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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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if (st->codec->field_order == AV_FIELD_PROGRESSIVE) {
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inter = 'p';
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} else if (st->codec->field_order == AV_FIELD_TB || st->codec->field_order == AV_FIELD_TT) {
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inter = 't';
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} else if (st->codec->field_order == AV_FIELD_BT || st->codec->field_order == AV_FIELD_BB) {
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inter = 'b';
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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->streams[0]->codec->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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#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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{
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char header[MAX_YUV4_HEADER + 10]; // Include headroom for
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// the longest option
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char *tokstart, *tokend, *header_end, interlaced = '?';
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int i;
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AVIOContext *pb = s->pb;
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int width = -1, height = -1, raten = 0,
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rated = 0, aspectn = 0, aspectd = 0;
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enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE, alt_pix_fmt = AV_PIX_FMT_NONE;
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enum AVChromaLocation chroma_sample_location = AVCHROMA_LOC_UNSPECIFIED;
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AVStream *st;
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for (i = 0; i < MAX_YUV4_HEADER; i++) {
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header[i] = avio_r8(pb);
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if (header[i] == '\n') {
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header[i + 1] = 0x20; // Add a space after last option.
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// Makes parsing "444" vs "444alpha" easier.
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header[i + 2] = 0;
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break;
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}
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}
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if (i == MAX_YUV4_HEADER)
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return -1;
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if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC)))
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return -1;
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header_end = &header[i + 1]; // Include space
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for (tokstart = &header[strlen(Y4M_MAGIC) + 1];
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tokstart < header_end; tokstart++) {
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if (*tokstart == 0x20)
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continue;
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switch (*tokstart++) {
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case 'W': // Width. Required.
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width = strtol(tokstart, &tokend, 10);
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tokstart = tokend;
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break;
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case 'H': // Height. Required.
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height = strtol(tokstart, &tokend, 10);
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tokstart = tokend;
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break;
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case 'C': // Color space
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if (strncmp("420jpeg", tokstart, 7) == 0) {
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pix_fmt = AV_PIX_FMT_YUV420P;
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chroma_sample_location = AVCHROMA_LOC_CENTER;
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} else if (strncmp("420mpeg2", tokstart, 8) == 0) {
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pix_fmt = AV_PIX_FMT_YUV420P;
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chroma_sample_location = AVCHROMA_LOC_LEFT;
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} else if (strncmp("420paldv", tokstart, 8) == 0) {
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pix_fmt = AV_PIX_FMT_YUV420P;
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chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
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} else if (strncmp("420p16", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_YUV420P16;
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} else if (strncmp("422p16", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_YUV422P16;
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} else if (strncmp("444p16", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_YUV444P16;
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} else if (strncmp("420p14", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_YUV420P14;
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} else if (strncmp("422p14", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_YUV422P14;
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} else if (strncmp("444p14", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_YUV444P14;
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} else if (strncmp("420p12", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_YUV420P12;
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} else if (strncmp("422p12", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_YUV422P12;
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} else if (strncmp("444p12", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_YUV444P12;
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} else if (strncmp("420p10", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_YUV420P10;
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} else if (strncmp("422p10", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_YUV422P10;
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} else if (strncmp("444p10", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_YUV444P10;
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} else if (strncmp("420p9", tokstart, 5) == 0) {
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pix_fmt = AV_PIX_FMT_YUV420P9;
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} else if (strncmp("422p9", tokstart, 5) == 0) {
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pix_fmt = AV_PIX_FMT_YUV422P9;
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} else if (strncmp("444p9", tokstart, 5) == 0) {
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pix_fmt = AV_PIX_FMT_YUV444P9;
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} else if (strncmp("420", tokstart, 3) == 0) {
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pix_fmt = AV_PIX_FMT_YUV420P;
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chroma_sample_location = AVCHROMA_LOC_CENTER;
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} else if (strncmp("411", tokstart, 3) == 0) {
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pix_fmt = AV_PIX_FMT_YUV411P;
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} else if (strncmp("422", tokstart, 3) == 0) {
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pix_fmt = AV_PIX_FMT_YUV422P;
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} else if (strncmp("444alpha", tokstart, 8) == 0 ) {
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av_log(s, AV_LOG_ERROR, "Cannot handle 4:4:4:4 "
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"YUV4MPEG stream.\n");
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return -1;
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} else if (strncmp("444", tokstart, 3) == 0) {
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pix_fmt = AV_PIX_FMT_YUV444P;
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} else if (strncmp("mono16", tokstart, 6) == 0) {
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pix_fmt = AV_PIX_FMT_GRAY16;
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} else if (strncmp("mono", tokstart, 4) == 0) {
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pix_fmt = AV_PIX_FMT_GRAY8;
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} else {
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av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown "
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"pixel format.\n");
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return -1;
|
|
}
|
|
while (tokstart < header_end && *tokstart != 0x20)
|
|
tokstart++;
|
|
break;
|
|
case 'I': // Interlace type
|
|
interlaced = *tokstart++;
|
|
break;
|
|
case 'F': // Frame rate
|
|
sscanf(tokstart, "%d:%d", &raten, &rated); // 0:0 if unknown
|
|
while (tokstart < header_end && *tokstart != 0x20)
|
|
tokstart++;
|
|
break;
|
|
case 'A': // Pixel aspect
|
|
sscanf(tokstart, "%d:%d", &aspectn, &aspectd); // 0:0 if unknown
|
|
while (tokstart < header_end && *tokstart != 0x20)
|
|
tokstart++;
|
|
break;
|
|
case 'X': // Vendor extensions
|
|
if (strncmp("YSCSS=", tokstart, 6) == 0) {
|
|
// Older nonstandard pixel format representation
|
|
tokstart += 6;
|
|
if (strncmp("420JPEG", tokstart, 7) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV420P;
|
|
else if (strncmp("420MPEG2", tokstart, 8) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV420P;
|
|
else if (strncmp("420PALDV", tokstart, 8) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV420P;
|
|
else if (strncmp("420P9", tokstart, 5) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV420P9;
|
|
else if (strncmp("422P9", tokstart, 5) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV422P9;
|
|
else if (strncmp("444P9", tokstart, 5) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV444P9;
|
|
else if (strncmp("420P10", tokstart, 6) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV420P10;
|
|
else if (strncmp("422P10", tokstart, 6) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV422P10;
|
|
else if (strncmp("444P10", tokstart, 6) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV444P10;
|
|
else if (strncmp("420P12", tokstart, 6) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV420P12;
|
|
else if (strncmp("422P12", tokstart, 6) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV422P12;
|
|
else if (strncmp("444P12", tokstart, 6) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV444P12;
|
|
else if (strncmp("420P14", tokstart, 6) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV420P14;
|
|
else if (strncmp("422P14", tokstart, 6) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV422P14;
|
|
else if (strncmp("444P14", tokstart, 6) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV444P14;
|
|
else if (strncmp("420P16", tokstart, 6) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV420P16;
|
|
else if (strncmp("422P16", tokstart, 6) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV422P16;
|
|
else if (strncmp("444P16", tokstart, 6) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV444P16;
|
|
else if (strncmp("411", tokstart, 3) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV411P;
|
|
else if (strncmp("422", tokstart, 3) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV422P;
|
|
else if (strncmp("444", tokstart, 3) == 0)
|
|
alt_pix_fmt = AV_PIX_FMT_YUV444P;
|
|
}
|
|
while (tokstart < header_end && *tokstart != 0x20)
|
|
tokstart++;
|
|
break;
|
|
}
|
|
}
|
|
|
|
if (width == -1 || height == -1) {
|
|
av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
|
|
return -1;
|
|
}
|
|
|
|
if (pix_fmt == AV_PIX_FMT_NONE) {
|
|
if (alt_pix_fmt == AV_PIX_FMT_NONE)
|
|
pix_fmt = AV_PIX_FMT_YUV420P;
|
|
else
|
|
pix_fmt = alt_pix_fmt;
|
|
}
|
|
|
|
if (raten <= 0 || rated <= 0) {
|
|
// Frame rate unknown
|
|
raten = 25;
|
|
rated = 1;
|
|
}
|
|
|
|
if (aspectn == 0 && aspectd == 0) {
|
|
// Pixel aspect unknown
|
|
aspectd = 1;
|
|
}
|
|
|
|
st = avformat_new_stream(s, NULL);
|
|
if (!st)
|
|
return AVERROR(ENOMEM);
|
|
st->codec->width = width;
|
|
st->codec->height = height;
|
|
av_reduce(&raten, &rated, raten, rated, (1UL << 31) - 1);
|
|
avpriv_set_pts_info(st, 64, rated, raten);
|
|
st->codec->pix_fmt = pix_fmt;
|
|
st->codec->codec_type = AVMEDIA_TYPE_VIDEO;
|
|
st->codec->codec_id = AV_CODEC_ID_RAWVIDEO;
|
|
st->sample_aspect_ratio = (AVRational){ aspectn, aspectd };
|
|
st->codec->chroma_sample_location = chroma_sample_location;
|
|
|
|
switch (interlaced){
|
|
case 'p':
|
|
st->codec->field_order = AV_FIELD_PROGRESSIVE;
|
|
break;
|
|
case 't':
|
|
st->codec->field_order = AV_FIELD_TB;
|
|
break;
|
|
case 'b':
|
|
st->codec->field_order = AV_FIELD_BT;
|
|
break;
|
|
case 'm':
|
|
av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed "
|
|
"interlaced and non-interlaced frames.\n");
|
|
case '?':
|
|
st->codec->field_order = AV_FIELD_UNKNOWN;
|
|
break;
|
|
default:
|
|
av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
|
|
return AVERROR(EINVAL);
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int i;
|
|
char header[MAX_FRAME_HEADER+1];
|
|
int packet_size, width, height, ret;
|
|
AVStream *st = s->streams[0];
|
|
|
|
for (i = 0; i < MAX_FRAME_HEADER; i++) {
|
|
header[i] = avio_r8(s->pb);
|
|
if (header[i] == '\n') {
|
|
header[i + 1] = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (s->pb->error)
|
|
return s->pb->error;
|
|
else if (s->pb->eof_reached)
|
|
return AVERROR_EOF;
|
|
else if (i == MAX_FRAME_HEADER)
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC)))
|
|
return AVERROR_INVALIDDATA;
|
|
|
|
width = st->codec->width;
|
|
height = st->codec->height;
|
|
|
|
packet_size = avpicture_get_size(st->codec->pix_fmt, width, height);
|
|
if (packet_size < 0)
|
|
return packet_size;
|
|
|
|
ret = av_get_packet(s->pb, pkt, packet_size);
|
|
if (ret < 0)
|
|
return ret;
|
|
else if (ret != packet_size)
|
|
return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO);
|
|
|
|
pkt->stream_index = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int yuv4_probe(AVProbeData *pd)
|
|
{
|
|
/* check file header */
|
|
if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC) - 1) == 0)
|
|
return AVPROBE_SCORE_MAX;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
#if CONFIG_YUV4MPEGPIPE_DEMUXER
|
|
AVInputFormat ff_yuv4mpegpipe_demuxer = {
|
|
.name = "yuv4mpegpipe",
|
|
.long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
|
|
.read_probe = yuv4_probe,
|
|
.read_header = yuv4_read_header,
|
|
.read_packet = yuv4_read_packet,
|
|
.extensions = "y4m",
|
|
};
|
|
#endif
|