From 058d5f2feb730846f22c1812e433f92f670ad751 Mon Sep 17 00:00:00 2001 From: Anton Khirnov Date: Sun, 1 Dec 2013 22:05:18 +0100 Subject: mjpegenc: do not pass MpegEncContext to ff_mjpeg_encode_picture_header() This will allow deMpegEncContextizing the LJPEG encoder. --- libavcodec/mjpegenc.c | 111 ++++++++++++++++++++++++++++++-------------------- 1 file changed, 67 insertions(+), 44 deletions(-) (limited to 'libavcodec/mjpegenc.c') diff --git a/libavcodec/mjpegenc.c b/libavcodec/mjpegenc.c index 7b54e504b0..1d69e671d5 100644 --- a/libavcodec/mjpegenc.c +++ b/libavcodec/mjpegenc.c @@ -32,6 +32,8 @@ #include +#include "libavutil/pixdesc.h" + #include "avcodec.h" #include "mpegvideo.h" #include "mjpeg.h" @@ -172,78 +174,99 @@ static void jpeg_put_comments(AVCodecContext *avctx, PutBitContext *p) } } -void ff_mjpeg_encode_picture_header(MpegEncContext *s) +void ff_mjpeg_encode_picture_header(AVCodecContext *avctx, PutBitContext *pb, + ScanTable *intra_scantable, + uint16_t intra_matrix[64]) { - const int lossless= s->avctx->codec_id != AV_CODEC_ID_MJPEG; + int chroma_h_shift, chroma_v_shift; + const int lossless = avctx->codec_id != AV_CODEC_ID_MJPEG; + int hsample[3], vsample[3]; + + av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, + &chroma_v_shift); + + if (avctx->codec->id == AV_CODEC_ID_LJPEG && + avctx->pix_fmt == AV_PIX_FMT_BGRA) { + vsample[0] = hsample[0] = + vsample[1] = hsample[1] = + vsample[2] = hsample[2] = 1; + } else { + vsample[0] = 2; + vsample[1] = 2 >> chroma_v_shift; + vsample[2] = 2 >> chroma_v_shift; + hsample[0] = 2; + hsample[1] = 2 >> chroma_h_shift; + hsample[2] = 2 >> chroma_h_shift; + } - put_marker(&s->pb, SOI); + put_marker(pb, SOI); - jpeg_put_comments(s->avctx, &s->pb); + jpeg_put_comments(avctx, pb); - jpeg_table_header(&s->pb, &s->intra_scantable, s->intra_matrix); + jpeg_table_header(pb, intra_scantable, intra_matrix); - switch(s->avctx->codec_id){ - case AV_CODEC_ID_MJPEG: put_marker(&s->pb, SOF0 ); break; - case AV_CODEC_ID_LJPEG: put_marker(&s->pb, SOF3 ); break; + switch (avctx->codec_id) { + case AV_CODEC_ID_MJPEG: put_marker(pb, SOF0 ); break; + case AV_CODEC_ID_LJPEG: put_marker(pb, SOF3 ); break; default: assert(0); } - put_bits(&s->pb, 16, 17); - if(lossless && s->avctx->pix_fmt == AV_PIX_FMT_BGRA) - put_bits(&s->pb, 8, 9); /* 9 bits/component RCT */ + put_bits(pb, 16, 17); + if (lossless && avctx->pix_fmt == AV_PIX_FMT_BGRA) + put_bits(pb, 8, 9); /* 9 bits/component RCT */ else - put_bits(&s->pb, 8, 8); /* 8 bits/component */ - put_bits(&s->pb, 16, s->height); - put_bits(&s->pb, 16, s->width); - put_bits(&s->pb, 8, 3); /* 3 components */ + put_bits(pb, 8, 8); /* 8 bits/component */ + put_bits(pb, 16, avctx->height); + put_bits(pb, 16, avctx->width); + put_bits(pb, 8, 3); /* 3 components */ /* Y component */ - put_bits(&s->pb, 8, 1); /* component number */ - put_bits(&s->pb, 4, s->mjpeg_hsample[0]); /* H factor */ - put_bits(&s->pb, 4, s->mjpeg_vsample[0]); /* V factor */ - put_bits(&s->pb, 8, 0); /* select matrix */ + put_bits(pb, 8, 1); /* component number */ + put_bits(pb, 4, hsample[0]); /* H factor */ + put_bits(pb, 4, vsample[0]); /* V factor */ + put_bits(pb, 8, 0); /* select matrix */ /* Cb component */ - put_bits(&s->pb, 8, 2); /* component number */ - put_bits(&s->pb, 4, s->mjpeg_hsample[1]); /* H factor */ - put_bits(&s->pb, 4, s->mjpeg_vsample[1]); /* V factor */ - put_bits(&s->pb, 8, 0); /* select matrix */ + put_bits(pb, 8, 2); /* component number */ + put_bits(pb, 4, hsample[1]); /* H factor */ + put_bits(pb, 4, vsample[1]); /* V factor */ + put_bits(pb, 8, 0); /* select matrix */ /* Cr component */ - put_bits(&s->pb, 8, 3); /* component number */ - put_bits(&s->pb, 4, s->mjpeg_hsample[2]); /* H factor */ - put_bits(&s->pb, 4, s->mjpeg_vsample[2]); /* V factor */ - put_bits(&s->pb, 8, 0); /* select matrix */ + put_bits(pb, 8, 3); /* component number */ + put_bits(pb, 4, hsample[2]); /* H factor */ + put_bits(pb, 4, vsample[2]); /* V factor */ + put_bits(pb, 8, 0); /* select matrix */ /* scan header */ - put_marker(&s->pb, SOS); - put_bits(&s->pb, 16, 12); /* length */ - put_bits(&s->pb, 8, 3); /* 3 components */ + put_marker(pb, SOS); + put_bits(pb, 16, 12); /* length */ + put_bits(pb, 8, 3); /* 3 components */ /* Y component */ - put_bits(&s->pb, 8, 1); /* index */ - put_bits(&s->pb, 4, 0); /* DC huffman table index */ - put_bits(&s->pb, 4, 0); /* AC huffman table index */ + put_bits(pb, 8, 1); /* index */ + put_bits(pb, 4, 0); /* DC huffman table index */ + put_bits(pb, 4, 0); /* AC huffman table index */ /* Cb component */ - put_bits(&s->pb, 8, 2); /* index */ - put_bits(&s->pb, 4, 1); /* DC huffman table index */ - put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */ + put_bits(pb, 8, 2); /* index */ + put_bits(pb, 4, 1); /* DC huffman table index */ + put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */ /* Cr component */ - put_bits(&s->pb, 8, 3); /* index */ - put_bits(&s->pb, 4, 1); /* DC huffman table index */ - put_bits(&s->pb, 4, lossless ? 0 : 1); /* AC huffman table index */ + put_bits(pb, 8, 3); /* index */ + put_bits(pb, 4, 1); /* DC huffman table index */ + put_bits(pb, 4, lossless ? 0 : 1); /* AC huffman table index */ - put_bits(&s->pb, 8, lossless ? s->avctx->prediction_method+1 : 0); /* Ss (not used) */ + put_bits(pb, 8, lossless ? avctx->prediction_method + 1 : 0); /* Ss (not used) */ - switch(s->avctx->codec_id){ - case AV_CODEC_ID_MJPEG: put_bits(&s->pb, 8, 63); break; /* Se (not used) */ - case AV_CODEC_ID_LJPEG: put_bits(&s->pb, 8, 0); break; /* not used */ + switch (avctx->codec_id) { + case AV_CODEC_ID_MJPEG: put_bits(pb, 8, 63); break; /* Se (not used) */ + case AV_CODEC_ID_LJPEG: put_bits(pb, 8, 0); break; /* not used */ default: assert(0); } - put_bits(&s->pb, 8, 0); /* Ah/Al (not used) */ + put_bits(pb, 8, 0); /* Ah/Al (not used) */ } static void escape_FF(MpegEncContext *s, int start) -- cgit v1.2.3