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FFmpeg/libavformat/yuv4mpegenc.c
Andreas Rheinhardt f4167842c1 avformat/mux: Add flag for "not more than one stream of each type" 
More exactly: Not more than one stream of each type for which
a default codec (i.e. AVOutputFormat.(audio|video|subtitle)_codec)
is set; for those types for which no such codec is set (or for
which no designated default codec in AVOutputFormat exists at all)
no streams are permitted.

Given that with this flag set the default codecs become more important,
they are now set explicitly to AV_CODEC_ID_NONE for "unset";
the earlier code relied on AV_CODEC_ID_NONE being equal to zero,
so that default static initialization set it accordingly;
but this is not how one is supposed to use an enum.

Signed-off-by: Andreas Rheinhardt <andreas.rheinhardt@outlook.com>
2024-03-22 23:57:19 +01:00

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/*
* YUV4MPEG muxer
* Copyright (c) 2001, 2002, 2003 Fabrice Bellard
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "libavutil/frame.h"
#include "libavutil/pixdesc.h"
#include "avformat.h"
#include "internal.h"
#include "mux.h"
#include "yuv4mpeg.h"
static int yuv4_write_header(AVFormatContext *s)
{
AVStream *st;
AVIOContext *pb = s->pb;
int width, height;
int raten, rated, aspectn, aspectd, ret;
char inter;
const char *colorspace = "";
const char *colorrange = "";
int field_order;
st = s->streams[0];
width = st->codecpar->width;
height = st->codecpar->height;
field_order = st->codecpar->field_order;
// TODO: should be avg_frame_rate
av_reduce(&raten, &rated, st->time_base.den,
st->time_base.num, (1UL << 31) - 1);
aspectn = st->sample_aspect_ratio.num;
aspectd = st->sample_aspect_ratio.den;
if (aspectn == 0 && aspectd == 1)
aspectd = 0; // 0:0 means unknown
switch(st->codecpar->color_range) {
case AVCOL_RANGE_MPEG:
colorrange = " XCOLORRANGE=LIMITED";
break;
case AVCOL_RANGE_JPEG:
colorrange = " XCOLORRANGE=FULL";
break;
default:
break;
}
switch (field_order) {
case AV_FIELD_TB:
case AV_FIELD_TT: inter = 't'; break;
case AV_FIELD_BT:
case AV_FIELD_BB: inter = 'b'; break;
default: inter = 'p'; break;
}
switch (st->codecpar->format) {
case AV_PIX_FMT_GRAY8:
colorspace = " Cmono";
break;
case AV_PIX_FMT_GRAY9:
colorspace = " Cmono9";
break;
case AV_PIX_FMT_GRAY10:
colorspace = " Cmono10";
break;
case AV_PIX_FMT_GRAY12:
colorspace = " Cmono12";
break;
case AV_PIX_FMT_GRAY16:
colorspace = " Cmono16";
break;
case AV_PIX_FMT_YUV411P:
colorspace = " C411 XYSCSS=411";
break;
case AV_PIX_FMT_YUVJ420P:
colorspace = " C420jpeg XYSCSS=420JPEG";
colorrange = " XCOLORRANGE=FULL";
break;
case AV_PIX_FMT_YUVJ422P:
colorspace = " C422 XYSCSS=422";
colorrange = " XCOLORRANGE=FULL";
break;
case AV_PIX_FMT_YUVJ444P:
colorspace = " C444 XYSCSS=444";
colorrange = " XCOLORRANGE=FULL";
break;
case AV_PIX_FMT_YUV420P:
switch (st->codecpar->chroma_location) {
case AVCHROMA_LOC_TOPLEFT: colorspace = " C420paldv XYSCSS=420PALDV"; break;
case AVCHROMA_LOC_LEFT: colorspace = " C420mpeg2 XYSCSS=420MPEG2"; break;
default: colorspace = " C420jpeg XYSCSS=420JPEG"; break;
}
break;
case AV_PIX_FMT_YUV422P:
colorspace = " C422 XYSCSS=422";
break;
case AV_PIX_FMT_YUV444P:
colorspace = " C444 XYSCSS=444";
break;
case AV_PIX_FMT_YUVA444P:
colorspace = " C444alpha XYSCSS=444";
break;
case AV_PIX_FMT_YUV420P9:
colorspace = " C420p9 XYSCSS=420P9";
break;
case AV_PIX_FMT_YUV422P9:
colorspace = " C422p9 XYSCSS=422P9";
break;
case AV_PIX_FMT_YUV444P9:
colorspace = " C444p9 XYSCSS=444P9";
break;
case AV_PIX_FMT_YUV420P10:
colorspace = " C420p10 XYSCSS=420P10";
break;
case AV_PIX_FMT_YUV422P10:
colorspace = " C422p10 XYSCSS=422P10";
break;
case AV_PIX_FMT_YUV444P10:
colorspace = " C444p10 XYSCSS=444P10";
break;
case AV_PIX_FMT_YUV420P12:
colorspace = " C420p12 XYSCSS=420P12";
break;
case AV_PIX_FMT_YUV422P12:
colorspace = " C422p12 XYSCSS=422P12";
break;
case AV_PIX_FMT_YUV444P12:
colorspace = " C444p12 XYSCSS=444P12";
break;
case AV_PIX_FMT_YUV420P14:
colorspace = " C420p14 XYSCSS=420P14";
break;
case AV_PIX_FMT_YUV422P14:
colorspace = " C422p14 XYSCSS=422P14";
break;
case AV_PIX_FMT_YUV444P14:
colorspace = " C444p14 XYSCSS=444P14";
break;
case AV_PIX_FMT_YUV420P16:
colorspace = " C420p16 XYSCSS=420P16";
break;
case AV_PIX_FMT_YUV422P16:
colorspace = " C422p16 XYSCSS=422P16";
break;
case AV_PIX_FMT_YUV444P16:
colorspace = " C444p16 XYSCSS=444P16";
break;
}
ret = avio_printf(pb, Y4M_MAGIC " W%d H%d F%d:%d I%c A%d:%d%s%s\n",
width, height, raten, rated, inter,
aspectn, aspectd, colorspace, colorrange);
if (ret < 0) {
av_log(s, AV_LOG_ERROR,
"Error. YUV4MPEG stream header write failed.\n");
return ret;
}
return 0;
}
static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
{
AVStream *st = s->streams[pkt->stream_index];
AVIOContext *pb = s->pb;
const AVFrame *frame = (const AVFrame *)pkt->data;
int width, height;
const AVPixFmtDescriptor *desc;
/* construct frame header */
avio_printf(s->pb, Y4M_FRAME_MAGIC "\n");
if (st->codecpar->codec_id == AV_CODEC_ID_RAWVIDEO) {
avio_write(pb, pkt->data, pkt->size);
return 0;
}
width = st->codecpar->width;
height = st->codecpar->height;
desc = av_pix_fmt_desc_get(st->codecpar->format);
/* The following code presumes all planes to be non-interleaved. */
for (int k = 0; k < desc->nb_components; k++) {
int plane_height = height, plane_width = width;
const uint8_t *ptr = frame->data[k];
if (desc->nb_components >= 3 && (k == 1 || k == 2)) { /* chroma? */
plane_width = AV_CEIL_RSHIFT(plane_width, desc->log2_chroma_w);
plane_height = AV_CEIL_RSHIFT(plane_height, desc->log2_chroma_h);
}
plane_width *= desc->comp[k].step;
for (int i = 0; i < plane_height; i++) {
avio_write(pb, ptr, plane_width);
ptr += frame->linesize[k];
}
}
return 0;
}
static int yuv4_init(AVFormatContext *s)
{
if (s->streams[0]->codecpar->codec_id != AV_CODEC_ID_WRAPPED_AVFRAME &&
s->streams[0]->codecpar->codec_id != AV_CODEC_ID_RAWVIDEO) {
av_log(s, AV_LOG_ERROR, "ERROR: Codec not supported.\n");
return AVERROR_INVALIDDATA;
}
switch (s->streams[0]->codecpar->format) {
case AV_PIX_FMT_YUV411P:
av_log(s, AV_LOG_WARNING, "Warning: generating rarely used 4:1:1 YUV "
"stream, some mjpegtools might not work.\n");
break;
case AV_PIX_FMT_GRAY8:
case AV_PIX_FMT_YUV420P:
case AV_PIX_FMT_YUV422P:
case AV_PIX_FMT_YUV444P:
// TODO: remove YUVJ pixel formats when they are completely removed from the codebase.
case AV_PIX_FMT_YUVJ420P:
case AV_PIX_FMT_YUVJ422P:
case AV_PIX_FMT_YUVJ444P:
break;
case AV_PIX_FMT_GRAY9:
case AV_PIX_FMT_GRAY10:
case AV_PIX_FMT_GRAY12:
case AV_PIX_FMT_GRAY16:
case AV_PIX_FMT_YUV420P9:
case AV_PIX_FMT_YUV422P9:
case AV_PIX_FMT_YUV444P9:
case AV_PIX_FMT_YUV420P10:
case AV_PIX_FMT_YUV422P10:
case AV_PIX_FMT_YUV444P10:
case AV_PIX_FMT_YUV420P12:
case AV_PIX_FMT_YUV422P12:
case AV_PIX_FMT_YUV444P12:
case AV_PIX_FMT_YUV420P14:
case AV_PIX_FMT_YUV422P14:
case AV_PIX_FMT_YUV444P14:
case AV_PIX_FMT_YUV420P16:
case AV_PIX_FMT_YUV422P16:
case AV_PIX_FMT_YUV444P16:
case AV_PIX_FMT_YUVA444P:
if (s->strict_std_compliance >= FF_COMPLIANCE_NORMAL) {
av_log(s, AV_LOG_ERROR, "'%s' is not an official yuv4mpegpipe pixel format. "
"Use '-strict -1' to encode to this pixel format.\n",
av_get_pix_fmt_name(s->streams[0]->codecpar->format));
return AVERROR(EINVAL);
}
av_log(s, AV_LOG_WARNING, "Warning: generating non standard YUV stream. "
"Mjpegtools will not work.\n");
break;
default:
av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg can only handle "
"yuv444p, yuv422p, yuv420p, yuv411p and gray8 pixel formats. "
"And using 'strict -1' also yuv444p9, yuv422p9, yuv420p9, "
"yuv444p10, yuv422p10, yuv420p10, "
"yuv444p12, yuv422p12, yuv420p12, "
"yuv444p14, yuv422p14, yuv420p14, "
"yuv444p16, yuv422p16, yuv420p16, "
"yuva444p, "
"gray9, gray10, gray12 "
"and gray16 pixel formats. "
"Use -pix_fmt to select one.\n");
return AVERROR(EIO);
}
return 0;
}
const FFOutputFormat ff_yuv4mpegpipe_muxer = {
.p.name = "yuv4mpegpipe",
.p.long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"),
.p.extensions = "y4m",
.p.audio_codec = AV_CODEC_ID_NONE,
.p.video_codec = AV_CODEC_ID_WRAPPED_AVFRAME,
.p.subtitle_codec = AV_CODEC_ID_NONE,
.init = yuv4_init,
.write_header = yuv4_write_header,
.write_packet = yuv4_write_packet,
.flags_internal = FF_OFMT_FLAG_MAX_ONE_OF_EACH,
};
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