From 0ea721f7ce81357bc4ec6eea609cd50482c3d15b Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Diego=20=27Flameeyes=27=20Petten=C3=B2?= Date: Sat, 2 Dec 2006 01:19:48 +0000 Subject: Start working on a branch where FFmpeg is not copied, patched and carved to be built with automake but instead imported inline and built using its own build system. This is an import of a slightly modified FFmpeg current tree. xine-lib builds, install and run fine with it, but there are of course plenty of things that needs to be fixed before it can even be considered for a 1.2.x series. Work will continue in the next days of course. CVS patchset: 8397 CVS date: 2006/12/02 01:19:48 --- contrib/ffmpeg/libavformat/yuv4mpeg.c | 408 ++++++++++++++++++++++++++++++++++ 1 file changed, 408 insertions(+) create mode 100644 contrib/ffmpeg/libavformat/yuv4mpeg.c (limited to 'contrib/ffmpeg/libavformat/yuv4mpeg.c') diff --git a/contrib/ffmpeg/libavformat/yuv4mpeg.c b/contrib/ffmpeg/libavformat/yuv4mpeg.c new file mode 100644 index 000000000..70214ae00 --- /dev/null +++ b/contrib/ffmpeg/libavformat/yuv4mpeg.c @@ -0,0 +1,408 @@ +/* + * YUV4MPEG format + * Copyright (c) 2001, 2002, 2003 Fabrice Bellard. + * + * 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 2.1 of the License, or (at your option) any later version. + * + * 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 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_MAGIC "YUV4MPEG2" +#define Y4M_FRAME_MAGIC "FRAME" +#define Y4M_LINE_MAX 256 + +struct frame_attributes { + int interlaced_frame; + int top_field_first; +}; + +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->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;ilinesize[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;ilinesize[1]; + } + for(i=0;ilinesize[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; +} + +#ifdef CONFIG_YUV4MPEGPIPE_MUXER +AVOutputFormat yuv4mpegpipe_muxer = { + "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 + +/* 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; iinterlaced_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(tokstartinterlaced_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(tokstartstreams[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; ipb); + 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; +} + +#ifdef CONFIG_YUV4MPEGPIPE_DEMUXER +AVInputFormat yuv4mpegpipe_demuxer = { + "yuv4mpegpipe", + "YUV4MPEG pipe format", + sizeof(struct frame_attributes), + yuv4_probe, + yuv4_read_header, + yuv4_read_packet, + yuv4_read_close, + .extensions = "y4m" +}; +#endif -- cgit v1.2.3