mirror of https://github.com/FFmpeg/FFmpeg.git
parent
3ef6c5264b
commit
e4dc1000d7
4 changed files with 220 additions and 174 deletions
@ -0,0 +1,27 @@ |
|||||||
|
/*
|
||||||
|
* YUV4MPEG common definitions |
||||||
|
* |
||||||
|
* This file is part of Libav. |
||||||
|
* |
||||||
|
* Libav 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. |
||||||
|
* |
||||||
|
* Libav 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 Libav; if not, write to the Free Software |
||||||
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
||||||
|
*/ |
||||||
|
|
||||||
|
#ifndef AVFORMAT_YUV4MPEG_H |
||||||
|
#define AVFORMAT_YUV4MPEG_H |
||||||
|
|
||||||
|
#define Y4M_MAGIC "YUV4MPEG2" |
||||||
|
#define Y4M_FRAME_MAGIC "FRAME" |
||||||
|
|
||||||
|
#endif /* AVFORMAT_YUV4MPEG_H */ |
@ -0,0 +1,186 @@ |
|||||||
|
/*
|
||||||
|
* YUV4MPEG muxer |
||||||
|
* Copyright (c) 2001, 2002, 2003 Fabrice Bellard |
||||||
|
* |
||||||
|
* This file is part of Libav. |
||||||
|
* |
||||||
|
* Libav 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. |
||||||
|
* |
||||||
|
* Libav 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 Libav; if not, write to the Free Software |
||||||
|
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
||||||
|
*/ |
||||||
|
|
||||||
|
#include "libavutil/pixdesc.h" |
||||||
|
#include "avformat.h" |
||||||
|
#include "internal.h" |
||||||
|
#include "yuv4mpeg.h" |
||||||
|
|
||||||
|
#define Y4M_LINE_MAX 256 |
||||||
|
|
||||||
|
static int yuv4_generate_header(AVFormatContext *s, char* buf) |
||||||
|
{ |
||||||
|
AVStream *st; |
||||||
|
int width, height; |
||||||
|
int raten, rated, aspectn, aspectd, n; |
||||||
|
char inter; |
||||||
|
const char *colorspace = ""; |
||||||
|
|
||||||
|
st = s->streams[0]; |
||||||
|
width = st->codec->width; |
||||||
|
height = st->codec->height; |
||||||
|
|
||||||
|
av_reduce(&raten, &rated, st->codec->time_base.den, |
||||||
|
st->codec->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
|
||||||
|
|
||||||
|
inter = 'p'; /* progressive is the default */ |
||||||
|
if (st->codec->coded_frame && st->codec->coded_frame->interlaced_frame) |
||||||
|
inter = st->codec->coded_frame->top_field_first ? 't' : 'b'; |
||||||
|
|
||||||
|
switch (st->codec->pix_fmt) { |
||||||
|
case AV_PIX_FMT_GRAY8: |
||||||
|
colorspace = " Cmono"; |
||||||
|
break; |
||||||
|
case AV_PIX_FMT_YUV411P: |
||||||
|
colorspace = " C411 XYSCSS=411"; |
||||||
|
break; |
||||||
|
case AV_PIX_FMT_YUV420P: |
||||||
|
switch (st->codec->chroma_sample_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; |
||||||
|
} |
||||||
|
|
||||||
|
/* construct stream header, if this is the first frame */ |
||||||
|
n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n", |
||||||
|
Y4M_MAGIC, width, height, raten, rated, inter, |
||||||
|
aspectn, aspectd, colorspace); |
||||||
|
|
||||||
|
return n; |
||||||
|
} |
||||||
|
|
||||||
|
static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt) |
||||||
|
{ |
||||||
|
AVStream *st = s->streams[pkt->stream_index]; |
||||||
|
AVIOContext *pb = s->pb; |
||||||
|
AVPicture *picture; |
||||||
|
int* first_pkt = s->priv_data; |
||||||
|
int width, height, h_chroma_shift, v_chroma_shift; |
||||||
|
int i; |
||||||
|
char buf2[Y4M_LINE_MAX + 1]; |
||||||
|
char buf1[20]; |
||||||
|
uint8_t *ptr, *ptr1, *ptr2; |
||||||
|
|
||||||
|
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…
Reference in new issue