From 9a63497b0f27a5c302a63103e88c239c02d430bb Mon Sep 17 00:00:00 2001 From: Baptiste Coudurier Date: Fri, 2 Mar 2007 12:26:07 +0000 Subject: support for mjpeg bottom field first in mov Originally committed as revision 8192 to svn://svn.ffmpeg.org/ffmpeg/trunk --- libavcodec/mjpeg.c | 16 ++++++++++++---- 1 file changed, 12 insertions(+), 4 deletions(-) (limited to 'libavcodec/mjpeg.c') diff --git a/libavcodec/mjpeg.c b/libavcodec/mjpeg.c index 956f809922..ed6016f939 100644 --- a/libavcodec/mjpeg.c +++ b/libavcodec/mjpeg.c @@ -965,6 +965,13 @@ static int mjpeg_decode_init(AVCodecContext *avctx) mjpeg_decode_dht(s); /* should check for error - but dunno */ } + if (avctx->extradata_size > 9 && + AV_RL32(avctx->extradata + 4) == MKTAG('f','i','e','l')) { + if (avctx->extradata[9] == 6) { /* quicktime icefloe 019 */ + s->interlace_polarity = 1; /* bottom field first */ + av_log(avctx, AV_LOG_DEBUG, "mjpeg bottom field first\n"); + } + } return 0; } @@ -1185,8 +1192,9 @@ static int mjpeg_decode_sof(MJpegDecodeContext *s) s->org_height != 0 && s->height < ((s->org_height * 3) / 4)) { s->interlaced = 1; -// s->bottom_field = (s->interlace_polarity) ? 1 : 0; - s->bottom_field = 0; + s->bottom_field = s->interlace_polarity; + s->picture.interlaced_frame = 1; + s->picture.top_field_first = !s->interlace_polarity; height *= 2; } @@ -1197,7 +1205,7 @@ static int mjpeg_decode_sof(MJpegDecodeContext *s) s->first_picture = 0; } - if(s->interlaced && s->bottom_field) + if(s->interlaced && (s->bottom_field == !s->interlace_polarity)) return 0; /* XXX: not complete test ! */ @@ -2167,7 +2175,7 @@ eoi_parser: if (s->interlaced) { s->bottom_field ^= 1; /* if not bottom field, do not output image yet */ - if (s->bottom_field) + if (s->bottom_field == !s->interlace_polarity) goto not_the_end; } *picture = s->picture; -- cgit v1.2.3