mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-11-26 19:01:44 +02:00
258 lines
6.9 KiB
C
258 lines
6.9 KiB
C
/*
|
|
* YUV4MPEG format
|
|
* Copyright (c) 2001, 2002, 2003 Fabrice Bellard.
|
|
*
|
|
* This library 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 of the License, or (at your option) any later version.
|
|
*
|
|
* This library 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 this library; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
#include "avformat.h"
|
|
|
|
#define Y4M_MAGIC "YUV4MPEG2"
|
|
#define Y4M_FRAME_MAGIC "FRAME"
|
|
#define Y4M_LINE_MAX 256
|
|
|
|
#ifdef CONFIG_ENCODERS
|
|
|
|
static int yuv4_generate_header(AVFormatContext *s, char* buf)
|
|
{
|
|
AVStream *st;
|
|
int width, height;
|
|
int raten, rated, aspectn, aspectd, n;
|
|
char inter;
|
|
|
|
st = s->streams[0];
|
|
width = st->codec.width;
|
|
height = st->codec.height;
|
|
|
|
av_reduce(&raten, &rated, st->codec.frame_rate, st->codec.frame_rate_base, (1UL<<31)-1);
|
|
|
|
aspectn = st->codec.sample_aspect_ratio.num;
|
|
aspectd = st->codec.sample_aspect_ratio.den;
|
|
|
|
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';
|
|
}
|
|
|
|
/* 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,
|
|
(st->codec.pix_fmt == PIX_FMT_YUV411P) ? " C411 XYSCSS=411" : " C420mpeg2 XYSCSS=420MPEG2");
|
|
|
|
return n;
|
|
}
|
|
|
|
static int yuv4_write_packet(AVFormatContext *s, int stream_index,
|
|
const uint8_t *buf, int size, int64_t pts)
|
|
{
|
|
AVStream *st = s->streams[stream_index];
|
|
ByteIOContext *pb = &s->pb;
|
|
AVPicture *picture;
|
|
int* first_pkt = s->priv_data;
|
|
int width, height;
|
|
int i, m;
|
|
char buf2[Y4M_LINE_MAX+1];
|
|
char buf1[20];
|
|
uint8_t *ptr, *ptr1, *ptr2;
|
|
|
|
picture = (AVPicture *)buf;
|
|
|
|
/* 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 -EIO;
|
|
} else {
|
|
put_buffer(pb, buf2, strlen(buf2));
|
|
}
|
|
}
|
|
|
|
/* construct frame header */
|
|
|
|
m = snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC);
|
|
put_buffer(pb, buf1, strlen(buf1));
|
|
|
|
width = st->codec.width;
|
|
height = st->codec.height;
|
|
|
|
ptr = picture->data[0];
|
|
for(i=0;i<height;i++) {
|
|
put_buffer(pb, ptr, width);
|
|
ptr += picture->linesize[0];
|
|
}
|
|
|
|
height >>= 1;
|
|
width >>= 1;
|
|
ptr1 = picture->data[1];
|
|
ptr2 = picture->data[2];
|
|
for(i=0;i<height;i++) { /* Cb */
|
|
put_buffer(pb, ptr1, width);
|
|
ptr1 += picture->linesize[1];
|
|
}
|
|
for(i=0;i<height;i++) { /* Cr */
|
|
put_buffer(pb, ptr2, width);
|
|
ptr2 += picture->linesize[2];
|
|
}
|
|
put_flush_packet(pb);
|
|
return 0;
|
|
}
|
|
|
|
static int yuv4_write_header(AVFormatContext *s)
|
|
{
|
|
int* first_pkt = s->priv_data;
|
|
|
|
if (s->nb_streams != 1)
|
|
return -EIO;
|
|
|
|
if (s->streams[0]->codec.pix_fmt == PIX_FMT_YUV411P) {
|
|
av_log(s, AV_LOG_ERROR, "Warning: generating non-standard 4:1:1 YUV stream, some mjpegtools might not work.\n");
|
|
}
|
|
else if (s->streams[0]->codec.pix_fmt != PIX_FMT_YUV420P) {
|
|
av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg only handles 4:2:0, 4:1:1 YUV data. Use -pix_fmt to select one.\n");
|
|
return -EIO;
|
|
}
|
|
|
|
*first_pkt = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int yuv4_write_trailer(AVFormatContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat yuv4mpegpipe_oformat = {
|
|
"yuv4mpegpipe",
|
|
"YUV4MPEG pipe format",
|
|
"",
|
|
"yuv4mpeg",
|
|
sizeof(int),
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
yuv4_write_header,
|
|
yuv4_write_packet,
|
|
yuv4_write_trailer,
|
|
.flags = AVFMT_RAWPICTURE,
|
|
};
|
|
#endif //CONFIG_ENCODERS
|
|
|
|
/* Header size increased to allow room for optional flags */
|
|
#define MAX_YUV4_HEADER 80
|
|
#define MAX_FRAME_HEADER 10
|
|
|
|
static int yuv4_read_header(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
char header[MAX_YUV4_HEADER+1];
|
|
int i;
|
|
ByteIOContext *pb = &s->pb;
|
|
int width, height, raten, rated, aspectn, aspectd;
|
|
char lacing;
|
|
AVStream *st;
|
|
|
|
for (i=0; i<MAX_YUV4_HEADER; i++) {
|
|
header[i] = get_byte(pb);
|
|
if (header[i] == '\n') {
|
|
header[i+1] = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (i == MAX_YUV4_HEADER) return -1;
|
|
if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC))) return -1;
|
|
sscanf(header+strlen(Y4M_MAGIC), " W%d H%d F%d:%d I%c A%d:%d",
|
|
&width, &height, &raten, &rated, &lacing, &aspectn, &aspectd);
|
|
|
|
st = av_new_stream(s, 0);
|
|
st = s->streams[0];
|
|
st->codec.width = width;
|
|
st->codec.height = height;
|
|
av_reduce(&raten, &rated, raten, rated, (1UL<<31)-1);
|
|
st->codec.frame_rate = raten;
|
|
st->codec.frame_rate_base = rated;
|
|
st->codec.pix_fmt = PIX_FMT_YUV420P;
|
|
st->codec.codec_type = CODEC_TYPE_VIDEO;
|
|
st->codec.codec_id = CODEC_ID_RAWVIDEO;
|
|
st->codec.sample_aspect_ratio= (AVRational){aspectn, aspectd};
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt)
|
|
{
|
|
int i;
|
|
char header[MAX_FRAME_HEADER+1];
|
|
int packet_size, ret, width, height;
|
|
AVStream *st = s->streams[0];
|
|
|
|
for (i=0; i<MAX_FRAME_HEADER; i++) {
|
|
header[i] = get_byte(&s->pb);
|
|
if (header[i] == '\n') {
|
|
header[i+1] = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (i == MAX_FRAME_HEADER) return -1;
|
|
if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC))) return -1;
|
|
|
|
width = st->codec.width;
|
|
height = st->codec.height;
|
|
|
|
packet_size = avpicture_get_size(st->codec.pix_fmt, width, height);
|
|
if (packet_size < 0)
|
|
av_abort();
|
|
|
|
if (av_new_packet(pkt, packet_size) < 0)
|
|
return -EIO;
|
|
|
|
pkt->stream_index = 0;
|
|
ret = get_buffer(&s->pb, pkt->data, pkt->size);
|
|
if (ret != pkt->size) {
|
|
av_free_packet(pkt);
|
|
return -EIO;
|
|
} else {
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
static int yuv4_read_close(AVFormatContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat yuv4mpegpipe_iformat = {
|
|
"yuv4mpegpipe",
|
|
"YUV4MPEG pipe format",
|
|
0,
|
|
NULL,
|
|
yuv4_read_header,
|
|
yuv4_read_packet,
|
|
yuv4_read_close,
|
|
.extensions = "yuv4mpeg"
|
|
};
|
|
|
|
int yuv4mpeg_init(void)
|
|
{
|
|
av_register_input_format(&yuv4mpegpipe_iformat);
|
|
#ifdef CONFIG_ENCODERS
|
|
av_register_output_format(&yuv4mpegpipe_oformat);
|
|
#endif //CONFIG_ENCODERS
|
|
return 0;
|
|
}
|
|
|