mirror of
https://github.com/FFmpeg/FFmpeg.git
synced 2024-12-02 03:06:28 +02:00
72fbc5092a
patch by Colin Ward, hitman*at*codehq*dot*org Originally committed as revision 4962 to svn://svn.ffmpeg.org/ffmpeg/trunk
416 lines
13 KiB
C
416 lines
13 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
|
|
*/
|
|
#include "avformat.h"
|
|
|
|
#define Y4M_MAGIC "YUV4MPEG2"
|
|
#define Y4M_FRAME_MAGIC "FRAME"
|
|
#define Y4M_LINE_MAX 256
|
|
|
|
struct frame_attributes {
|
|
int interlaced_frame;
|
|
int top_field_first;
|
|
};
|
|
|
|
#ifdef CONFIG_MUXERS
|
|
|
|
static int yuv4_generate_header(AVFormatContext *s, char* buf)
|
|
{
|
|
AVStream *st;
|
|
int width, height;
|
|
int raten, rated, aspectn, aspectd, n;
|
|
char inter;
|
|
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->codec->sample_aspect_ratio.num;
|
|
aspectd = st->codec->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 PIX_FMT_GRAY8:
|
|
colorspace = " Cmono";
|
|
break;
|
|
case PIX_FMT_YUV411P:
|
|
colorspace = " C411 XYSCSS=411";
|
|
break;
|
|
case PIX_FMT_YUV420P:
|
|
colorspace = (st->codec->codec_id == CODEC_ID_DVVIDEO)?" C420paldv XYSCSS=420PALDV":" C420mpeg2 XYSCSS=420MPEG2";
|
|
break;
|
|
case PIX_FMT_YUV422P:
|
|
colorspace = " C422 XYSCSS=422";
|
|
break;
|
|
case 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];
|
|
ByteIOContext *pb = &s->pb;
|
|
AVPicture *picture;
|
|
int* first_pkt = s->priv_data;
|
|
int width, height, h_chroma_shift, v_chroma_shift;
|
|
int i, m;
|
|
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_IO;
|
|
} 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];
|
|
}
|
|
|
|
if (st->codec->pix_fmt != PIX_FMT_GRAY8){
|
|
// Adjust for smaller Cb and Cr planes
|
|
avcodec_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift, &v_chroma_shift);
|
|
width >>= h_chroma_shift;
|
|
height >>= v_chroma_shift;
|
|
|
|
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 AVERROR_IO;
|
|
|
|
if (s->streams[0]->codec->pix_fmt == 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 != PIX_FMT_YUV420P) &&
|
|
(s->streams[0]->codec->pix_fmt != PIX_FMT_YUV422P) &&
|
|
(s->streams[0]->codec->pix_fmt != PIX_FMT_GRAY8) &&
|
|
(s->streams[0]->codec->pix_fmt != 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_IO;
|
|
}
|
|
|
|
*first_pkt = 1;
|
|
return 0;
|
|
}
|
|
|
|
static int yuv4_write_trailer(AVFormatContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
AVOutputFormat yuv4mpegpipe_oformat = {
|
|
"yuv4mpegpipe",
|
|
"YUV4MPEG pipe format",
|
|
"",
|
|
"y4m",
|
|
sizeof(int),
|
|
CODEC_ID_NONE,
|
|
CODEC_ID_RAWVIDEO,
|
|
yuv4_write_header,
|
|
yuv4_write_packet,
|
|
yuv4_write_trailer,
|
|
.flags = AVFMT_RAWPICTURE,
|
|
};
|
|
#endif //CONFIG_MUXERS
|
|
|
|
/* Header size increased to allow room for optional flags */
|
|
#define MAX_YUV4_HEADER 80
|
|
#define MAX_FRAME_HEADER 80
|
|
|
|
static int yuv4_read_header(AVFormatContext *s, AVFormatParameters *ap)
|
|
{
|
|
char header[MAX_YUV4_HEADER+10]; // Include headroom for the longest option
|
|
char *tokstart,*tokend,*header_end;
|
|
int i;
|
|
ByteIOContext *pb = &s->pb;
|
|
int width=-1, height=-1, raten=0, rated=0, aspectn=0, aspectd=0;
|
|
enum PixelFormat pix_fmt=PIX_FMT_NONE,alt_pix_fmt=PIX_FMT_NONE;
|
|
AVStream *st;
|
|
struct frame_attributes *s1 = s->priv_data;
|
|
|
|
for (i=0; i<MAX_YUV4_HEADER; i++) {
|
|
header[i] = get_byte(pb);
|
|
if (header[i] == '\n') {
|
|
header[i+1] = 0x20; // Add a space after last option. Makes parsing "444" vs "444alpha" easier.
|
|
header[i+2] = 0;
|
|
break;
|
|
}
|
|
}
|
|
if (i == MAX_YUV4_HEADER) return -1;
|
|
if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC))) return -1;
|
|
|
|
s1->interlaced_frame = 0;
|
|
s1->top_field_first = 0;
|
|
header_end = &header[i+1]; // Include space
|
|
for(tokstart = &header[strlen(Y4M_MAGIC) + 1]; tokstart < header_end; tokstart++) {
|
|
if (*tokstart==0x20) continue;
|
|
switch (*tokstart++) {
|
|
case 'W': // Width. Required.
|
|
width = strtol(tokstart, &tokend, 10);
|
|
tokstart=tokend;
|
|
break;
|
|
case 'H': // Height. Required.
|
|
height = strtol(tokstart, &tokend, 10);
|
|
tokstart=tokend;
|
|
break;
|
|
case 'C': // Color space
|
|
if (strncmp("420jpeg",tokstart,7)==0)
|
|
pix_fmt = PIX_FMT_YUV420P;
|
|
else if (strncmp("420mpeg2",tokstart,8)==0)
|
|
pix_fmt = PIX_FMT_YUV420P;
|
|
else if (strncmp("420paldv", tokstart, 8)==0)
|
|
pix_fmt = PIX_FMT_YUV420P;
|
|
else if (strncmp("411", tokstart, 3)==0)
|
|
pix_fmt = PIX_FMT_YUV411P;
|
|
else if (strncmp("422", tokstart, 3)==0)
|
|
pix_fmt = PIX_FMT_YUV422P;
|
|
else if (strncmp("444alpha", tokstart, 8)==0) {
|
|
av_log(s, AV_LOG_ERROR, "Cannot handle 4:4:4:4 YUV4MPEG stream.\n");
|
|
return -1;
|
|
} else if (strncmp("444", tokstart, 3)==0)
|
|
pix_fmt = PIX_FMT_YUV444P;
|
|
else if (strncmp("mono",tokstart, 4)==0) {
|
|
pix_fmt = PIX_FMT_GRAY8;
|
|
} else {
|
|
av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown pixel format.\n");
|
|
return -1;
|
|
}
|
|
while(tokstart<header_end&&*tokstart!=0x20) tokstart++;
|
|
break;
|
|
case 'I': // Interlace type
|
|
switch (*tokstart++){
|
|
case '?':
|
|
break;
|
|
case 'p':
|
|
s1->interlaced_frame=0;
|
|
break;
|
|
case 't':
|
|
s1->interlaced_frame=1;
|
|
s1->top_field_first=1;
|
|
break;
|
|
case 'b':
|
|
s1->interlaced_frame=1;
|
|
s1->top_field_first=0;
|
|
break;
|
|
case 'm':
|
|
av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed interlaced and non-interlaced frames.\n");
|
|
return -1;
|
|
default:
|
|
av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n");
|
|
return -1;
|
|
}
|
|
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=PIX_FMT_YUV420P;
|
|
else if (strncmp("420MPEG2",tokstart,8)==0)
|
|
alt_pix_fmt=PIX_FMT_YUV420P;
|
|
else if (strncmp("420PALDV",tokstart,8)==0)
|
|
alt_pix_fmt=PIX_FMT_YUV420P;
|
|
else if (strncmp("411",tokstart,3)==0)
|
|
alt_pix_fmt=PIX_FMT_YUV411P;
|
|
else if (strncmp("422",tokstart,3)==0)
|
|
alt_pix_fmt=PIX_FMT_YUV422P;
|
|
else if (strncmp("444",tokstart,3)==0)
|
|
alt_pix_fmt=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 == PIX_FMT_NONE) {
|
|
if (alt_pix_fmt == PIX_FMT_NONE)
|
|
pix_fmt = 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 = 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);
|
|
av_set_pts_info(st, 64, rated, raten);
|
|
st->codec->pix_fmt = pix_fmt;
|
|
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, width, height;
|
|
AVStream *st = s->streams[0];
|
|
struct frame_attributes *s1 = s->priv_data;
|
|
|
|
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)
|
|
return -1;
|
|
|
|
if (av_get_packet(&s->pb, pkt, packet_size) != packet_size)
|
|
return AVERROR_IO;
|
|
|
|
if (s->streams[0]->codec->coded_frame) {
|
|
s->streams[0]->codec->coded_frame->interlaced_frame = s1->interlaced_frame;
|
|
s->streams[0]->codec->coded_frame->top_field_first = s1->top_field_first;
|
|
}
|
|
|
|
pkt->stream_index = 0;
|
|
return 0;
|
|
}
|
|
|
|
static int yuv4_read_close(AVFormatContext *s)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static int yuv4_probe(AVProbeData *pd)
|
|
{
|
|
/* check file header */
|
|
if (pd->buf_size <= sizeof(Y4M_MAGIC))
|
|
return 0;
|
|
if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC)-1)==0)
|
|
return AVPROBE_SCORE_MAX;
|
|
else
|
|
return 0;
|
|
}
|
|
|
|
AVInputFormat yuv4mpegpipe_iformat = {
|
|
"yuv4mpegpipe",
|
|
"YUV4MPEG pipe format",
|
|
sizeof(struct frame_attributes),
|
|
yuv4_probe,
|
|
yuv4_read_header,
|
|
yuv4_read_packet,
|
|
yuv4_read_close,
|
|
.extensions = "y4m"
|
|
};
|
|
|
|
int yuv4mpeg_init(void)
|
|
{
|
|
av_register_input_format(&yuv4mpegpipe_iformat);
|
|
#ifdef CONFIG_MUXERS
|
|
av_register_output_format(&yuv4mpegpipe_oformat);
|
|
#endif //CONFIG_MUXERS
|
|
return 0;
|
|
}
|
|
|