yading@11: /* yading@11: * YUV4MPEG format yading@11: * Copyright (c) 2001, 2002, 2003 Fabrice Bellard yading@11: * yading@11: * This file is part of FFmpeg. yading@11: * yading@11: * FFmpeg is free software; you can redistribute it and/or yading@11: * modify it under the terms of the GNU Lesser General Public yading@11: * License as published by the Free Software Foundation; either yading@11: * version 2.1 of the License, or (at your option) any later version. yading@11: * yading@11: * FFmpeg is distributed in the hope that it will be useful, yading@11: * but WITHOUT ANY WARRANTY; without even the implied warranty of yading@11: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU yading@11: * Lesser General Public License for more details. yading@11: * yading@11: * You should have received a copy of the GNU Lesser General Public yading@11: * License along with FFmpeg; if not, write to the Free Software yading@11: * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA yading@11: */ yading@11: yading@11: #include "libavutil/pixdesc.h" yading@11: #include "avformat.h" yading@11: #include "internal.h" yading@11: #include "libavutil/pixdesc.h" yading@11: yading@11: #define Y4M_MAGIC "YUV4MPEG2" yading@11: #define Y4M_FRAME_MAGIC "FRAME" yading@11: #define Y4M_LINE_MAX 256 yading@11: yading@11: #if CONFIG_YUV4MPEGPIPE_MUXER yading@11: static int yuv4_generate_header(AVFormatContext *s, char* buf) yading@11: { yading@11: AVStream *st; yading@11: int width, height; yading@11: int raten, rated, aspectn, aspectd, n; yading@11: char inter; yading@11: const char *colorspace = ""; yading@11: yading@11: st = s->streams[0]; yading@11: width = st->codec->width; yading@11: height = st->codec->height; yading@11: yading@11: av_reduce(&raten, &rated, st->codec->time_base.den, yading@11: st->codec->time_base.num, (1UL << 31) - 1); yading@11: yading@11: aspectn = st->sample_aspect_ratio.num; yading@11: aspectd = st->sample_aspect_ratio.den; yading@11: yading@11: if (aspectn == 0 && aspectd == 1) yading@11: aspectd = 0; // 0:0 means unknown yading@11: yading@11: inter = 'p'; /* progressive is the default */ yading@11: if (st->codec->coded_frame && st->codec->coded_frame->interlaced_frame) yading@11: inter = st->codec->coded_frame->top_field_first ? 't' : 'b'; yading@11: if (st->codec->field_order == AV_FIELD_PROGRESSIVE) { yading@11: inter = 'p'; yading@11: } else if (st->codec->field_order == AV_FIELD_TB || st->codec->field_order == AV_FIELD_TT) { yading@11: inter = 't'; yading@11: } else if (st->codec->field_order == AV_FIELD_BT || st->codec->field_order == AV_FIELD_BB) { yading@11: inter = 'b'; yading@11: } yading@11: yading@11: switch (st->codec->pix_fmt) { yading@11: case AV_PIX_FMT_GRAY8: yading@11: colorspace = " Cmono"; yading@11: break; yading@11: case AV_PIX_FMT_GRAY16: yading@11: colorspace = " Cmono16"; yading@11: break; yading@11: case AV_PIX_FMT_YUV411P: yading@11: colorspace = " C411 XYSCSS=411"; yading@11: break; yading@11: case AV_PIX_FMT_YUV420P: yading@11: switch (st->codec->chroma_sample_location) { yading@11: case AVCHROMA_LOC_TOPLEFT: colorspace = " C420paldv XYSCSS=420PALDV"; break; yading@11: case AVCHROMA_LOC_LEFT: colorspace = " C420mpeg2 XYSCSS=420MPEG2"; break; yading@11: default: colorspace = " C420jpeg XYSCSS=420JPEG"; break; yading@11: } yading@11: break; yading@11: case AV_PIX_FMT_YUV422P: yading@11: colorspace = " C422 XYSCSS=422"; yading@11: break; yading@11: case AV_PIX_FMT_YUV444P: yading@11: colorspace = " C444 XYSCSS=444"; yading@11: break; yading@11: case AV_PIX_FMT_YUV420P9: yading@11: colorspace = " C420p9 XYSCSS=420P9"; yading@11: break; yading@11: case AV_PIX_FMT_YUV422P9: yading@11: colorspace = " C422p9 XYSCSS=422P9"; yading@11: break; yading@11: case AV_PIX_FMT_YUV444P9: yading@11: colorspace = " C444p9 XYSCSS=444P9"; yading@11: break; yading@11: case AV_PIX_FMT_YUV420P10: yading@11: colorspace = " C420p10 XYSCSS=420P10"; yading@11: break; yading@11: case AV_PIX_FMT_YUV422P10: yading@11: colorspace = " C422p10 XYSCSS=422P10"; yading@11: break; yading@11: case AV_PIX_FMT_YUV444P10: yading@11: colorspace = " C444p10 XYSCSS=444P10"; yading@11: break; yading@11: case AV_PIX_FMT_YUV420P12: yading@11: colorspace = " C420p12 XYSCSS=420P12"; yading@11: break; yading@11: case AV_PIX_FMT_YUV422P12: yading@11: colorspace = " C422p12 XYSCSS=422P12"; yading@11: break; yading@11: case AV_PIX_FMT_YUV444P12: yading@11: colorspace = " C444p12 XYSCSS=444P12"; yading@11: break; yading@11: case AV_PIX_FMT_YUV420P14: yading@11: colorspace = " C420p14 XYSCSS=420P14"; yading@11: break; yading@11: case AV_PIX_FMT_YUV422P14: yading@11: colorspace = " C422p14 XYSCSS=422P14"; yading@11: break; yading@11: case AV_PIX_FMT_YUV444P14: yading@11: colorspace = " C444p14 XYSCSS=444P14"; yading@11: break; yading@11: case AV_PIX_FMT_YUV420P16: yading@11: colorspace = " C420p16 XYSCSS=420P16"; yading@11: break; yading@11: case AV_PIX_FMT_YUV422P16: yading@11: colorspace = " C422p16 XYSCSS=422P16"; yading@11: break; yading@11: case AV_PIX_FMT_YUV444P16: yading@11: colorspace = " C444p16 XYSCSS=444P16"; yading@11: break; yading@11: } yading@11: yading@11: /* construct stream header, if this is the first frame */ yading@11: n = snprintf(buf, Y4M_LINE_MAX, "%s W%d H%d F%d:%d I%c A%d:%d%s\n", yading@11: Y4M_MAGIC, width, height, raten, rated, inter, yading@11: aspectn, aspectd, colorspace); yading@11: yading@11: return n; yading@11: } yading@11: yading@11: static int yuv4_write_packet(AVFormatContext *s, AVPacket *pkt) yading@11: { yading@11: AVStream *st = s->streams[pkt->stream_index]; yading@11: AVIOContext *pb = s->pb; yading@11: AVPicture *picture, picture_tmp; yading@11: int* first_pkt = s->priv_data; yading@11: int width, height, h_chroma_shift, v_chroma_shift; yading@11: int i; yading@11: char buf2[Y4M_LINE_MAX + 1]; yading@11: char buf1[20]; yading@11: uint8_t *ptr, *ptr1, *ptr2; yading@11: yading@11: memcpy(&picture_tmp, pkt->data, sizeof(AVPicture)); yading@11: picture = &picture_tmp; yading@11: yading@11: /* for the first packet we have to output the header as well */ yading@11: if (*first_pkt) { yading@11: *first_pkt = 0; yading@11: if (yuv4_generate_header(s, buf2) < 0) { yading@11: av_log(s, AV_LOG_ERROR, yading@11: "Error. YUV4MPEG stream header write failed.\n"); yading@11: return AVERROR(EIO); yading@11: } else { yading@11: avio_write(pb, buf2, strlen(buf2)); yading@11: } yading@11: } yading@11: yading@11: /* construct frame header */ yading@11: yading@11: snprintf(buf1, sizeof(buf1), "%s\n", Y4M_FRAME_MAGIC); yading@11: avio_write(pb, buf1, strlen(buf1)); yading@11: yading@11: width = st->codec->width; yading@11: height = st->codec->height; yading@11: yading@11: ptr = picture->data[0]; yading@11: yading@11: switch (st->codec->pix_fmt) { yading@11: case AV_PIX_FMT_GRAY8: yading@11: case AV_PIX_FMT_YUV411P: yading@11: case AV_PIX_FMT_YUV420P: yading@11: case AV_PIX_FMT_YUV422P: yading@11: case AV_PIX_FMT_YUV444P: yading@11: break; yading@11: case AV_PIX_FMT_GRAY16: yading@11: case AV_PIX_FMT_YUV420P9: yading@11: case AV_PIX_FMT_YUV422P9: yading@11: case AV_PIX_FMT_YUV444P9: yading@11: case AV_PIX_FMT_YUV420P10: yading@11: case AV_PIX_FMT_YUV422P10: yading@11: case AV_PIX_FMT_YUV444P10: yading@11: case AV_PIX_FMT_YUV420P12: yading@11: case AV_PIX_FMT_YUV422P12: yading@11: case AV_PIX_FMT_YUV444P12: yading@11: case AV_PIX_FMT_YUV420P14: yading@11: case AV_PIX_FMT_YUV422P14: yading@11: case AV_PIX_FMT_YUV444P14: yading@11: case AV_PIX_FMT_YUV420P16: yading@11: case AV_PIX_FMT_YUV422P16: yading@11: case AV_PIX_FMT_YUV444P16: yading@11: width *= 2; yading@11: break; yading@11: default: yading@11: av_log(s, AV_LOG_ERROR, "The pixel format '%s' is not supported.\n", yading@11: av_get_pix_fmt_name(st->codec->pix_fmt)); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: yading@11: for (i = 0; i < height; i++) { yading@11: avio_write(pb, ptr, width); yading@11: ptr += picture->linesize[0]; yading@11: } yading@11: yading@11: if (st->codec->pix_fmt != AV_PIX_FMT_GRAY8 && yading@11: st->codec->pix_fmt != AV_PIX_FMT_GRAY16) { yading@11: // Adjust for smaller Cb and Cr planes yading@11: av_pix_fmt_get_chroma_sub_sample(st->codec->pix_fmt, &h_chroma_shift, yading@11: &v_chroma_shift); yading@11: width >>= h_chroma_shift; yading@11: height >>= v_chroma_shift; yading@11: yading@11: ptr1 = picture->data[1]; yading@11: ptr2 = picture->data[2]; yading@11: for (i = 0; i < height; i++) { /* Cb */ yading@11: avio_write(pb, ptr1, width); yading@11: ptr1 += picture->linesize[1]; yading@11: } yading@11: for (i = 0; i < height; i++) { /* Cr */ yading@11: avio_write(pb, ptr2, width); yading@11: ptr2 += picture->linesize[2]; yading@11: } yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int yuv4_write_header(AVFormatContext *s) yading@11: { yading@11: int *first_pkt = s->priv_data; yading@11: yading@11: if (s->nb_streams != 1) yading@11: return AVERROR(EIO); yading@11: yading@11: if (s->streams[0]->codec->codec_id != AV_CODEC_ID_RAWVIDEO) { yading@11: av_log(s, AV_LOG_ERROR, "ERROR: Only rawvideo supported.\n"); yading@11: return AVERROR_INVALIDDATA; yading@11: } yading@11: yading@11: switch (s->streams[0]->codec->pix_fmt) { yading@11: case AV_PIX_FMT_YUV411P: yading@11: av_log(s, AV_LOG_WARNING, "Warning: generating rarely used 4:1:1 YUV " yading@11: "stream, some mjpegtools might not work.\n"); yading@11: break; yading@11: case AV_PIX_FMT_GRAY8: yading@11: case AV_PIX_FMT_GRAY16: yading@11: case AV_PIX_FMT_YUV420P: yading@11: case AV_PIX_FMT_YUV422P: yading@11: case AV_PIX_FMT_YUV444P: yading@11: break; yading@11: case AV_PIX_FMT_YUV420P9: yading@11: case AV_PIX_FMT_YUV422P9: yading@11: case AV_PIX_FMT_YUV444P9: yading@11: case AV_PIX_FMT_YUV420P10: yading@11: case AV_PIX_FMT_YUV422P10: yading@11: case AV_PIX_FMT_YUV444P10: yading@11: case AV_PIX_FMT_YUV420P12: yading@11: case AV_PIX_FMT_YUV422P12: yading@11: case AV_PIX_FMT_YUV444P12: yading@11: case AV_PIX_FMT_YUV420P14: yading@11: case AV_PIX_FMT_YUV422P14: yading@11: case AV_PIX_FMT_YUV444P14: yading@11: case AV_PIX_FMT_YUV420P16: yading@11: case AV_PIX_FMT_YUV422P16: yading@11: case AV_PIX_FMT_YUV444P16: yading@11: if (s->streams[0]->codec->strict_std_compliance >= FF_COMPLIANCE_NORMAL) { yading@11: av_log(s, AV_LOG_ERROR, "'%s' is not a official yuv4mpegpipe pixel format. " yading@11: "Use '-strict -1' to encode to this pixel format.\n", yading@11: av_get_pix_fmt_name(s->streams[0]->codec->pix_fmt)); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: av_log(s, AV_LOG_WARNING, "Warning: generating non standard YUV stream. " yading@11: "Mjpegtools will not work.\n"); yading@11: break; yading@11: default: yading@11: av_log(s, AV_LOG_ERROR, "ERROR: yuv4mpeg can only handle " yading@11: "yuv444p, yuv422p, yuv420p, yuv411p and gray8 pixel formats. " yading@11: "And using 'strict -1' also yuv444p9, yuv422p9, yuv420p9, " yading@11: "yuv444p10, yuv422p10, yuv420p10, " yading@11: "yuv444p12, yuv422p12, yuv420p12, " yading@11: "yuv444p14, yuv422p14, yuv420p14, " yading@11: "yuv444p16, yuv422p16, yuv420p16 " yading@11: "and gray16 pixel formats. " yading@11: "Use -pix_fmt to select one.\n"); yading@11: return AVERROR(EIO); yading@11: } yading@11: yading@11: *first_pkt = 1; yading@11: return 0; yading@11: } yading@11: yading@11: AVOutputFormat ff_yuv4mpegpipe_muxer = { yading@11: .name = "yuv4mpegpipe", yading@11: .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"), yading@11: .extensions = "y4m", yading@11: .priv_data_size = sizeof(int), yading@11: .audio_codec = AV_CODEC_ID_NONE, yading@11: .video_codec = AV_CODEC_ID_RAWVIDEO, yading@11: .write_header = yuv4_write_header, yading@11: .write_packet = yuv4_write_packet, yading@11: .flags = AVFMT_RAWPICTURE, yading@11: }; yading@11: #endif yading@11: yading@11: /* Header size increased to allow room for optional flags */ yading@11: #define MAX_YUV4_HEADER 80 yading@11: #define MAX_FRAME_HEADER 80 yading@11: yading@11: static int yuv4_read_header(AVFormatContext *s) yading@11: { yading@11: char header[MAX_YUV4_HEADER + 10]; // Include headroom for yading@11: // the longest option yading@11: char *tokstart, *tokend, *header_end, interlaced = '?'; yading@11: int i; yading@11: AVIOContext *pb = s->pb; yading@11: int width = -1, height = -1, raten = 0, yading@11: rated = 0, aspectn = 0, aspectd = 0; yading@11: enum AVPixelFormat pix_fmt = AV_PIX_FMT_NONE, alt_pix_fmt = AV_PIX_FMT_NONE; yading@11: enum AVChromaLocation chroma_sample_location = AVCHROMA_LOC_UNSPECIFIED; yading@11: AVStream *st; yading@11: yading@11: for (i = 0; i < MAX_YUV4_HEADER; i++) { yading@11: header[i] = avio_r8(pb); yading@11: if (header[i] == '\n') { yading@11: header[i + 1] = 0x20; // Add a space after last option. yading@11: // Makes parsing "444" vs "444alpha" easier. yading@11: header[i + 2] = 0; yading@11: break; yading@11: } yading@11: } yading@11: if (i == MAX_YUV4_HEADER) yading@11: return -1; yading@11: if (strncmp(header, Y4M_MAGIC, strlen(Y4M_MAGIC))) yading@11: return -1; yading@11: yading@11: header_end = &header[i + 1]; // Include space yading@11: for (tokstart = &header[strlen(Y4M_MAGIC) + 1]; yading@11: tokstart < header_end; tokstart++) { yading@11: if (*tokstart == 0x20) yading@11: continue; yading@11: switch (*tokstart++) { yading@11: case 'W': // Width. Required. yading@11: width = strtol(tokstart, &tokend, 10); yading@11: tokstart = tokend; yading@11: break; yading@11: case 'H': // Height. Required. yading@11: height = strtol(tokstart, &tokend, 10); yading@11: tokstart = tokend; yading@11: break; yading@11: case 'C': // Color space yading@11: if (strncmp("420jpeg", tokstart, 7) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV420P; yading@11: chroma_sample_location = AVCHROMA_LOC_CENTER; yading@11: } else if (strncmp("420mpeg2", tokstart, 8) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV420P; yading@11: chroma_sample_location = AVCHROMA_LOC_LEFT; yading@11: } else if (strncmp("420paldv", tokstart, 8) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV420P; yading@11: chroma_sample_location = AVCHROMA_LOC_TOPLEFT; yading@11: } else if (strncmp("420p16", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV420P16; yading@11: } else if (strncmp("422p16", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV422P16; yading@11: } else if (strncmp("444p16", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV444P16; yading@11: } else if (strncmp("420p14", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV420P14; yading@11: } else if (strncmp("422p14", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV422P14; yading@11: } else if (strncmp("444p14", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV444P14; yading@11: } else if (strncmp("420p12", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV420P12; yading@11: } else if (strncmp("422p12", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV422P12; yading@11: } else if (strncmp("444p12", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV444P12; yading@11: } else if (strncmp("420p10", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV420P10; yading@11: } else if (strncmp("422p10", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV422P10; yading@11: } else if (strncmp("444p10", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV444P10; yading@11: } else if (strncmp("420p9", tokstart, 5) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV420P9; yading@11: } else if (strncmp("422p9", tokstart, 5) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV422P9; yading@11: } else if (strncmp("444p9", tokstart, 5) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV444P9; yading@11: } else if (strncmp("420", tokstart, 3) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV420P; yading@11: chroma_sample_location = AVCHROMA_LOC_CENTER; yading@11: } else if (strncmp("411", tokstart, 3) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV411P; yading@11: } else if (strncmp("422", tokstart, 3) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV422P; yading@11: } else if (strncmp("444alpha", tokstart, 8) == 0 ) { yading@11: av_log(s, AV_LOG_ERROR, "Cannot handle 4:4:4:4 " yading@11: "YUV4MPEG stream.\n"); yading@11: return -1; yading@11: } else if (strncmp("444", tokstart, 3) == 0) { yading@11: pix_fmt = AV_PIX_FMT_YUV444P; yading@11: } else if (strncmp("mono16", tokstart, 6) == 0) { yading@11: pix_fmt = AV_PIX_FMT_GRAY16; yading@11: } else if (strncmp("mono", tokstart, 4) == 0) { yading@11: pix_fmt = AV_PIX_FMT_GRAY8; yading@11: } else { yading@11: av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains an unknown " yading@11: "pixel format.\n"); yading@11: return -1; yading@11: } yading@11: while (tokstart < header_end && *tokstart != 0x20) yading@11: tokstart++; yading@11: break; yading@11: case 'I': // Interlace type yading@11: interlaced = *tokstart++; yading@11: break; yading@11: case 'F': // Frame rate yading@11: sscanf(tokstart, "%d:%d", &raten, &rated); // 0:0 if unknown yading@11: while (tokstart < header_end && *tokstart != 0x20) yading@11: tokstart++; yading@11: break; yading@11: case 'A': // Pixel aspect yading@11: sscanf(tokstart, "%d:%d", &aspectn, &aspectd); // 0:0 if unknown yading@11: while (tokstart < header_end && *tokstart != 0x20) yading@11: tokstart++; yading@11: break; yading@11: case 'X': // Vendor extensions yading@11: if (strncmp("YSCSS=", tokstart, 6) == 0) { yading@11: // Older nonstandard pixel format representation yading@11: tokstart += 6; yading@11: if (strncmp("420JPEG", tokstart, 7) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV420P; yading@11: else if (strncmp("420MPEG2", tokstart, 8) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV420P; yading@11: else if (strncmp("420PALDV", tokstart, 8) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV420P; yading@11: else if (strncmp("420P9", tokstart, 5) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV420P9; yading@11: else if (strncmp("422P9", tokstart, 5) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV422P9; yading@11: else if (strncmp("444P9", tokstart, 5) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV444P9; yading@11: else if (strncmp("420P10", tokstart, 6) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV420P10; yading@11: else if (strncmp("422P10", tokstart, 6) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV422P10; yading@11: else if (strncmp("444P10", tokstart, 6) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV444P10; yading@11: else if (strncmp("420P12", tokstart, 6) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV420P12; yading@11: else if (strncmp("422P12", tokstart, 6) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV422P12; yading@11: else if (strncmp("444P12", tokstart, 6) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV444P12; yading@11: else if (strncmp("420P14", tokstart, 6) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV420P14; yading@11: else if (strncmp("422P14", tokstart, 6) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV422P14; yading@11: else if (strncmp("444P14", tokstart, 6) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV444P14; yading@11: else if (strncmp("420P16", tokstart, 6) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV420P16; yading@11: else if (strncmp("422P16", tokstart, 6) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV422P16; yading@11: else if (strncmp("444P16", tokstart, 6) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV444P16; yading@11: else if (strncmp("411", tokstart, 3) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV411P; yading@11: else if (strncmp("422", tokstart, 3) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV422P; yading@11: else if (strncmp("444", tokstart, 3) == 0) yading@11: alt_pix_fmt = AV_PIX_FMT_YUV444P; yading@11: } yading@11: while (tokstart < header_end && *tokstart != 0x20) yading@11: tokstart++; yading@11: break; yading@11: } yading@11: } yading@11: yading@11: if (width == -1 || height == -1) { yading@11: av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n"); yading@11: return -1; yading@11: } yading@11: yading@11: if (pix_fmt == AV_PIX_FMT_NONE) { yading@11: if (alt_pix_fmt == AV_PIX_FMT_NONE) yading@11: pix_fmt = AV_PIX_FMT_YUV420P; yading@11: else yading@11: pix_fmt = alt_pix_fmt; yading@11: } yading@11: yading@11: if (raten <= 0 || rated <= 0) { yading@11: // Frame rate unknown yading@11: raten = 25; yading@11: rated = 1; yading@11: } yading@11: yading@11: if (aspectn == 0 && aspectd == 0) { yading@11: // Pixel aspect unknown yading@11: aspectd = 1; yading@11: } yading@11: yading@11: st = avformat_new_stream(s, NULL); yading@11: if (!st) yading@11: return AVERROR(ENOMEM); yading@11: st->codec->width = width; yading@11: st->codec->height = height; yading@11: av_reduce(&raten, &rated, raten, rated, (1UL << 31) - 1); yading@11: avpriv_set_pts_info(st, 64, rated, raten); yading@11: st->codec->pix_fmt = pix_fmt; yading@11: st->codec->codec_type = AVMEDIA_TYPE_VIDEO; yading@11: st->codec->codec_id = AV_CODEC_ID_RAWVIDEO; yading@11: st->sample_aspect_ratio = (AVRational){ aspectn, aspectd }; yading@11: st->codec->chroma_sample_location = chroma_sample_location; yading@11: yading@11: switch (interlaced){ yading@11: case 'p': yading@11: st->codec->field_order = AV_FIELD_PROGRESSIVE; yading@11: break; yading@11: case 't': yading@11: st->codec->field_order = AV_FIELD_TB; yading@11: break; yading@11: case 'b': yading@11: st->codec->field_order = AV_FIELD_BT; yading@11: break; yading@11: case 'm': yading@11: av_log(s, AV_LOG_ERROR, "YUV4MPEG stream contains mixed " yading@11: "interlaced and non-interlaced frames.\n"); yading@11: case '?': yading@11: st->codec->field_order = AV_FIELD_UNKNOWN; yading@11: break; yading@11: default: yading@11: av_log(s, AV_LOG_ERROR, "YUV4MPEG has invalid header.\n"); yading@11: return AVERROR(EINVAL); yading@11: } yading@11: yading@11: return 0; yading@11: } yading@11: yading@11: static int yuv4_read_packet(AVFormatContext *s, AVPacket *pkt) yading@11: { yading@11: int i; yading@11: char header[MAX_FRAME_HEADER+1]; yading@11: int packet_size, width, height, ret; yading@11: AVStream *st = s->streams[0]; yading@11: yading@11: for (i = 0; i < MAX_FRAME_HEADER; i++) { yading@11: header[i] = avio_r8(s->pb); yading@11: if (header[i] == '\n') { yading@11: header[i + 1] = 0; yading@11: break; yading@11: } yading@11: } yading@11: if (s->pb->error) yading@11: return s->pb->error; yading@11: else if (s->pb->eof_reached) yading@11: return AVERROR_EOF; yading@11: else if (i == MAX_FRAME_HEADER) yading@11: return AVERROR_INVALIDDATA; yading@11: yading@11: if (strncmp(header, Y4M_FRAME_MAGIC, strlen(Y4M_FRAME_MAGIC))) yading@11: return AVERROR_INVALIDDATA; yading@11: yading@11: width = st->codec->width; yading@11: height = st->codec->height; yading@11: yading@11: packet_size = avpicture_get_size(st->codec->pix_fmt, width, height); yading@11: if (packet_size < 0) yading@11: return packet_size; yading@11: yading@11: ret = av_get_packet(s->pb, pkt, packet_size); yading@11: if (ret < 0) yading@11: return ret; yading@11: else if (ret != packet_size) yading@11: return s->pb->eof_reached ? AVERROR_EOF : AVERROR(EIO); yading@11: yading@11: pkt->stream_index = 0; yading@11: return 0; yading@11: } yading@11: yading@11: static int yuv4_probe(AVProbeData *pd) yading@11: { yading@11: /* check file header */ yading@11: if (strncmp(pd->buf, Y4M_MAGIC, sizeof(Y4M_MAGIC) - 1) == 0) yading@11: return AVPROBE_SCORE_MAX; yading@11: else yading@11: return 0; yading@11: } yading@11: yading@11: #if CONFIG_YUV4MPEGPIPE_DEMUXER yading@11: AVInputFormat ff_yuv4mpegpipe_demuxer = { yading@11: .name = "yuv4mpegpipe", yading@11: .long_name = NULL_IF_CONFIG_SMALL("YUV4MPEG pipe"), yading@11: .read_probe = yuv4_probe, yading@11: .read_header = yuv4_read_header, yading@11: .read_packet = yuv4_read_packet, yading@11: .extensions = "y4m", yading@11: }; yading@11: #endif