+++ /dev/null
-/*
- * 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
-
-static int yuv4_write_header(AVFormatContext *s)
-{
- AVStream *st;
- int width, height;
- int raten, rated, aspectn, aspectd, n;
- char buf[Y4M_LINE_MAX+1];
-
- 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
- {
- int gcd, fps, fps1;
-
- 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;
- break;
- case 50000:
- raten = 50;
- rated = 1;
- break;
- case 59940:
- raten = 60000;
- rated = 1001;
- break;
- case 60000:
- raten = 60;
- rated = 1;
- 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;
- 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",
- 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;
-}
-
-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 width, height;
- int i, m;
- char buf1[20];
- uint8_t *ptr, *ptr1, *ptr2;
-
- picture = (AVPicture *)buf;
-
- /* 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_trailer(AVFormatContext *s)
-{
- return 0;
-}
-
-AVOutputFormat yuv4mpegpipe_oformat = {
- "yuv4mpegpipe",
- "YUV4MPEG pipe format",
- "",
- "yuv4mpeg",
- 0,
- CODEC_ID_NONE,
- CODEC_ID_RAWVIDEO,
- yuv4_write_header,
- yuv4_write_packet,
- yuv4_write_trailer,
- .flags = AVFMT_RAWPICTURE,
-};
-
-/* 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;
-
- 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);
- av_register_output_format(&yuv4mpegpipe_oformat);
- return 0;
-}
-
projects / synfig.git / blobdiff