/*
* YUV4MPEG format
- * Copyright (c) 2001, 2002, 2003 Fabrice Bellard.
+ * Copyright (c) 2001, 2002, 2003 Fabrice Bellard
*
- * This library is free software; you can redistribute it and/or
+ * 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 of the License, or (at your option) any later version.
+ * version 2.1 of the License, or (at your option) any later version.
*
- * This library is distributed in the hope that it will be useful,
+ * 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 this library; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * License along with FFmpeg; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include "avformat.h"
#define Y4M_FRAME_MAGIC "FRAME"
#define Y4M_LINE_MAX 256
-static int yuv4_write_header(AVFormatContext *s)
+struct frame_attributes {
+ int interlaced_frame;
+ int top_field_first;
+};
+
+#if CONFIG_YUV4MPEGPIPE_MUXER
+static int yuv4_generate_header(AVFormatContext *s, char* buf)
{
AVStream *st;
int width, height;
- int raten, rated, aspectn, aspectd, fps, fps1, n, gcd;
- char buf[Y4M_LINE_MAX+1];
+ int raten, rated, aspectn, aspectd, n;
+ char inter;
+ const char *colorspace = "";
- if (s->nb_streams != 1)
- return -EIO;
-
st = s->streams[0];
- width = st->codec.width;
- height = st->codec.height;
-
-#if 1
- //this is identical to the code below for exact fps
- av_reduce(&raten, &rated, st->codec.frame_rate, st->codec.frame_rate_base, (1UL<<31)-1);
-#else
- fps = st->codec.frame_rate;
- fps1 = (((float)fps / st->codec.frame_rate_base) * 1000);
-
- /* Sorry about this messy code, but mpeg2enc is very picky about
- * the framerates it accepts. */
- switch(fps1) {
- case 23976:
- raten = 24000; /* turn the framerate into a ratio */
- rated = 1001;
- break;
- case 29970:
- raten = 30000;
- rated = 1001;
- break;
- case 25000:
- raten = 25;
- rated = 1;
- break;
- case 30000:
- raten = 30;
- rated = 1;
- break;
- case 24000:
- raten = 24;
- rated = 1;
+ 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 PIX_FMT_GRAY8:
+ colorspace = " Cmono";
break;
- case 50000:
- raten = 50;
- rated = 1;
+ case PIX_FMT_YUV411P:
+ colorspace = " C411 XYSCSS=411";
break;
- case 59940:
- raten = 60000;
- rated = 1001;
+ case PIX_FMT_YUV420P:
+ colorspace = (st->codec->chroma_sample_location == AVCHROMA_LOC_TOPLEFT)?" C420paldv XYSCSS=420PALDV":
+ (st->codec->chroma_sample_location == AVCHROMA_LOC_LEFT) ?" C420mpeg2 XYSCSS=420MPEG2":
+ " C420jpeg XYSCSS=420JPEG";
break;
- case 60000:
- raten = 60;
- rated = 1;
+ case PIX_FMT_YUV422P:
+ colorspace = " C422 XYSCSS=422";
break;
- default:
- raten = st->codec.frame_rate; /* this setting should work, but often doesn't */
- rated = st->codec.frame_rate_base;
- gcd= av_gcd(raten, rated);
- raten /= gcd;
- rated /= gcd;
+ case PIX_FMT_YUV444P:
+ colorspace = " C444 XYSCSS=444";
break;
}
-#endif
-
- aspectn = 1;
- aspectd = 1; /* ffmpeg always uses a 1:1 aspect ratio */ //FIXME not true anymore
/* construct stream header, if this is the first frame */
- n = snprintf(buf, sizeof(buf), "%s W%d H%d F%d:%d I%s A%d:%d\n",
+ 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,
- "p", /* ffmpeg seems to only output progressive video */
- aspectn, aspectd);
- if (n < 0) {
- fprintf(stderr, "Error. YUV4MPEG stream header write failed.\n");
- return -EIO;
- } else {
- put_buffer(&s->pb, buf, strlen(buf));
- }
- return 0;
+ inter,
+ aspectn, aspectd,
+ colorspace);
+
+ return n;
}
-static int yuv4_write_packet(AVFormatContext *s, int stream_index,
- uint8_t *buf, int size, int force_pts)
+static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt)
{
- AVStream *st = s->streams[stream_index];
- ByteIOContext *pb = &s->pb;
+ AVStream *st = s->streams[pkt->stream_index];
+ ByteIOContext *pb = s->pb;
AVPicture *picture;
- int width, height;
+ 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 *)buf;
+ 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 {
+ put_buffer(pb, buf2, strlen(buf2));
+ }
+ }
/* construct frame header */
- m = snprintf(buf1, sizeof(buf1), "%s \n", Y4M_FRAME_MAGIC);
+
+ m = snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC);
put_buffer(pb, buf1, strlen(buf1));
- width = st->codec.width;
- height = st->codec.height;
-
+ 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;
+ 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 */
+ for(i=0;i<height;i++) { /* Cb */
put_buffer(pb, ptr1, width);
ptr1 += picture->linesize[1];
}
- for(i=0;i<height;i++) { /* Cr */
+ 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_trailer(AVFormatContext *s)
+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->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(EIO);
+ }
+
+ *first_pkt = 1;
return 0;
}
-AVOutputFormat yuv4mpegpipe_oformat = {
+AVOutputFormat yuv4mpegpipe_muxer = {
"yuv4mpegpipe",
- "YUV4MPEG pipe format",
+ NULL_IF_CONFIG_SMALL("YUV4MPEG pipe format"),
"",
- "yuv4mpeg",
- 0,
+ "y4m",
+ sizeof(int),
CODEC_ID_NONE,
CODEC_ID_RAWVIDEO,
yuv4_write_header,
yuv4_write_packet,
- yuv4_write_trailer,
.flags = AVFMT_RAWPICTURE,
};
+#endif
+/* 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;
+ enum AVChromaLocation chroma_sample_location = AVCHROMA_LOC_UNSPECIFIED;
+ 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;
+ chroma_sample_location = AVCHROMA_LOC_CENTER;
+ } else if (strncmp("420mpeg2",tokstart,8)==0) {
+ pix_fmt = PIX_FMT_YUV420P;
+ chroma_sample_location = AVCHROMA_LOC_LEFT;
+ } else if (strncmp("420paldv", tokstart, 8)==0) {
+ pix_fmt = PIX_FMT_YUV420P;
+ chroma_sample_location = AVCHROMA_LOC_TOPLEFT;
+ } 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);
+ if(!st)
+ return AVERROR(ENOMEM);
+ 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->sample_aspect_ratio= (AVRational){aspectn, aspectd};
+ st->codec->chroma_sample_location = chroma_sample_location;
+
+ 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(EIO);
+
+ 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_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 yuv4mpegpipe_demuxer = {
+ "yuv4mpegpipe",
+ NULL_IF_CONFIG_SMALL("YUV4MPEG pipe format"),
+ sizeof(struct frame_attributes),
+ yuv4_probe,
+ yuv4_read_header,
+ yuv4_read_packet,
+ .extensions = "y4m"
+};
+#endif
projects / ffmpeg / blobdiff