diff options
Diffstat (limited to 'libavcodec/ljpegenc.c')
| -rw-r--r-- | libavcodec/ljpegenc.c | 70 |
1 files changed, 31 insertions, 39 deletions
diff --git a/libavcodec/ljpegenc.c b/libavcodec/ljpegenc.c index e111c8c557..6fd86ff227 100644 --- a/libavcodec/ljpegenc.c +++ b/libavcodec/ljpegenc.c @@ -8,20 +8,20 @@ * aspecting, new decode_frame mechanism and apple mjpeg-b support * by Alex Beregszaszi * - * This file is part of Libav. + * This file is part of FFmpeg. * - * Libav is free software; you can redistribute it and/or + * 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. * - * Libav is distributed in the hope that it will be useful, + * 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 Libav; if not, write to the Free Software + * License along with FFmpeg; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA */ @@ -76,7 +76,7 @@ static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb, const int modified_predictor = y ? predictor : 1; uint8_t *ptr = frame->data[0] + (linesize * y); - if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) < width * 3 * 3) { + if (pb->buf_end - pb->buf - (put_bits_count(pb) >> 3) < width * 3 * 4) { av_log(avctx, AV_LOG_ERROR, "encoded frame too large\n"); return -1; } @@ -85,9 +85,15 @@ static int ljpeg_encode_bgr(AVCodecContext *avctx, PutBitContext *pb, top[i]= left[i]= topleft[i]= buffer[0][i]; for (x = 0; x < width; x++) { - buffer[x][1] = ptr[3 * x + 0] - ptr[3 * x + 1] + 0x100; - buffer[x][2] = ptr[3 * x + 2] - ptr[3 * x + 1] + 0x100; - buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2; + if(avctx->pix_fmt == AV_PIX_FMT_BGR24){ + buffer[x][1] = ptr[3 * x + 0] - ptr[3 * x + 1] + 0x100; + buffer[x][2] = ptr[3 * x + 2] - ptr[3 * x + 1] + 0x100; + buffer[x][0] = (ptr[3 * x + 0] + 2 * ptr[3 * x + 1] + ptr[3 * x + 2]) >> 2; + }else{ + buffer[x][1] = ptr[4 * x + 0] - ptr[4 * x + 1] + 0x100; + buffer[x][2] = ptr[4 * x + 2] - ptr[4 * x + 1] + 0x100; + buffer[x][0] = (ptr[4 * x + 0] + 2 * ptr[4 * x + 1] + ptr[4 * x + 2]) >> 2; + } for (i = 0; i < 3; i++) { int pred, diff; @@ -212,25 +218,28 @@ static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt, int max_pkt_size = FF_MIN_BUFFER_SIZE; int ret, header_bits; - if (avctx->pix_fmt == AV_PIX_FMT_BGR24) - max_pkt_size += width * height * 3 * 3; + if( avctx->pix_fmt == AV_PIX_FMT_BGR0 + || avctx->pix_fmt == AV_PIX_FMT_BGRA + || avctx->pix_fmt == AV_PIX_FMT_BGR24) + max_pkt_size += width * height * 3 * 4; else { max_pkt_size += mb_width * mb_height * 3 * 4 * s->hsample[0] * s->vsample[0]; } - if ((ret = ff_alloc_packet(pkt, max_pkt_size)) < 0) { - av_log(avctx, AV_LOG_ERROR, "Error getting output packet of size %d.\n", max_pkt_size); + + if ((ret = ff_alloc_packet2(avctx, pkt, max_pkt_size)) < 0) return ret; - } init_put_bits(&pb, pkt->data, pkt->size); ff_mjpeg_encode_picture_header(avctx, &pb, &s->scantable, - s->matrix); + s->matrix, s->matrix); header_bits = put_bits_count(&pb); - if (avctx->pix_fmt == AV_PIX_FMT_BGR24) + if( avctx->pix_fmt == AV_PIX_FMT_BGR0 + || avctx->pix_fmt == AV_PIX_FMT_BGRA + || avctx->pix_fmt == AV_PIX_FMT_BGR24) ret = ljpeg_encode_bgr(avctx, &pb, pict); else ret = ljpeg_encode_yuv(avctx, &pb, pict); @@ -239,6 +248,7 @@ static int ljpeg_encode_frame(AVCodecContext *avctx, AVPacket *pkt, emms_c(); + ff_mjpeg_escape_FF(&pb, header_bits >> 3); ff_mjpeg_encode_picture_trailer(&pb, header_bits); flush_put_bits(&pb); @@ -262,7 +272,6 @@ static av_cold int ljpeg_encode_close(AVCodecContext *avctx) static av_cold int ljpeg_encode_init(AVCodecContext *avctx) { LJpegEncContext *s = avctx->priv_data; - int chroma_v_shift, chroma_h_shift; if ((avctx->pix_fmt == AV_PIX_FMT_YUV420P || avctx->pix_fmt == AV_PIX_FMT_YUV422P || @@ -287,21 +296,7 @@ static av_cold int ljpeg_encode_init(AVCodecContext *avctx) ff_dsputil_init(&s->dsp, avctx); ff_init_scantable(s->dsp.idct_permutation, &s->scantable, ff_zigzag_direct); - av_pix_fmt_get_chroma_sub_sample(avctx->pix_fmt, &chroma_h_shift, - &chroma_v_shift); - - if (avctx->pix_fmt == AV_PIX_FMT_BGR24) { - s->vsample[0] = s->hsample[0] = - s->vsample[1] = s->hsample[1] = - s->vsample[2] = s->hsample[2] = 1; - } else { - s->vsample[0] = 2; - s->vsample[1] = 2 >> chroma_v_shift; - s->vsample[2] = 2 >> chroma_v_shift; - s->hsample[0] = 2; - s->hsample[1] = 2 >> chroma_h_shift; - s->hsample[2] = 2 >> chroma_h_shift; - } + ff_mjpeg_init_hvsample(avctx, s->hsample, s->vsample); ff_mjpeg_build_huffman_codes(s->huff_size_dc_luminance, s->huff_code_dc_luminance, @@ -324,12 +319,9 @@ AVCodec ff_ljpeg_encoder = { .init = ljpeg_encode_init, .encode2 = ljpeg_encode_frame, .close = ljpeg_encode_close, - .pix_fmts = (const enum AVPixelFormat[]){ AV_PIX_FMT_YUVJ420P, - AV_PIX_FMT_YUVJ422P, - AV_PIX_FMT_YUVJ444P, - AV_PIX_FMT_BGR24, - AV_PIX_FMT_YUV420P, - AV_PIX_FMT_YUV422P, - AV_PIX_FMT_YUV444P, - AV_PIX_FMT_NONE }, + .pix_fmts = (const enum AVPixelFormat[]){ + AV_PIX_FMT_BGR24 , AV_PIX_FMT_BGRA , AV_PIX_FMT_BGR0, + AV_PIX_FMT_YUVJ420P, AV_PIX_FMT_YUVJ444P, AV_PIX_FMT_YUVJ422P, + AV_PIX_FMT_YUV420P , AV_PIX_FMT_YUV444P , AV_PIX_FMT_YUV422P, + AV_PIX_FMT_NONE}, }; |