diff options
Diffstat (limited to 'contrib/ffmpeg/libavformat/yuv4mpeg.c')
-rw-r--r-- | contrib/ffmpeg/libavformat/yuv4mpeg.c | 408 |
1 files changed, 0 insertions, 408 deletions
diff --git a/contrib/ffmpeg/libavformat/yuv4mpeg.c b/contrib/ffmpeg/libavformat/yuv4mpeg.c deleted file mode 100644 index 70214ae00..000000000 --- a/contrib/ffmpeg/libavformat/yuv4mpeg.c +++ /dev/null @@ -1,408 +0,0 @@ -/* - * 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;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; -} - -#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; 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; -} - -#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 |