diff options
Diffstat (limited to 'contrib/ffmpeg/libavcodec/mjpegbdec.c')
-rw-r--r-- | contrib/ffmpeg/libavcodec/mjpegbdec.c | 149 |
1 files changed, 0 insertions, 149 deletions
diff --git a/contrib/ffmpeg/libavcodec/mjpegbdec.c b/contrib/ffmpeg/libavcodec/mjpegbdec.c deleted file mode 100644 index 0f27379f3..000000000 --- a/contrib/ffmpeg/libavcodec/mjpegbdec.c +++ /dev/null @@ -1,149 +0,0 @@ -/* - * Apple MJPEG-B decoder - * Copyright (c) 2002 Alex Beregszaszi - * - * 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 - */ - -/** - * @file mjpegbdec.c - * Apple MJPEG-B decoder. - */ - -#include "avcodec.h" -#include "mjpeg.h" -#include "mjpegdec.h" - - -static int mjpegb_decode_frame(AVCodecContext *avctx, - void *data, int *data_size, - const uint8_t *buf, int buf_size) -{ - MJpegDecodeContext *s = avctx->priv_data; - const uint8_t *buf_end, *buf_ptr; - AVFrame *picture = data; - GetBitContext hgb; /* for the header */ - uint32_t dqt_offs, dht_offs, sof_offs, sos_offs, second_field_offs; - uint32_t field_size, sod_offs; - - buf_ptr = buf; - buf_end = buf + buf_size; - -read_header: - /* reset on every SOI */ - s->restart_interval = 0; - s->restart_count = 0; - s->mjpb_skiptosod = 0; - - init_get_bits(&hgb, buf_ptr, /*buf_size*/(buf_end - buf_ptr)*8); - - skip_bits(&hgb, 32); /* reserved zeros */ - - if (get_bits_long(&hgb, 32) != MKBETAG('m','j','p','g')) - { - av_log(avctx, AV_LOG_WARNING, "not mjpeg-b (bad fourcc)\n"); - return 0; - } - - field_size = get_bits_long(&hgb, 32); /* field size */ - av_log(avctx, AV_LOG_DEBUG, "field size: 0x%x\n", field_size); - skip_bits(&hgb, 32); /* padded field size */ - second_field_offs = get_bits_long(&hgb, 32); - av_log(avctx, AV_LOG_DEBUG, "second field offs: 0x%x\n", second_field_offs); - - dqt_offs = get_bits_long(&hgb, 32); - av_log(avctx, AV_LOG_DEBUG, "dqt offs: 0x%x\n", dqt_offs); - if (dqt_offs) - { - init_get_bits(&s->gb, buf_ptr+dqt_offs, (buf_end - (buf_ptr+dqt_offs))*8); - s->start_code = DQT; - ff_mjpeg_decode_dqt(s); - } - - dht_offs = get_bits_long(&hgb, 32); - av_log(avctx, AV_LOG_DEBUG, "dht offs: 0x%x\n", dht_offs); - if (dht_offs) - { - init_get_bits(&s->gb, buf_ptr+dht_offs, (buf_end - (buf_ptr+dht_offs))*8); - s->start_code = DHT; - ff_mjpeg_decode_dht(s); - } - - sof_offs = get_bits_long(&hgb, 32); - av_log(avctx, AV_LOG_DEBUG, "sof offs: 0x%x\n", sof_offs); - if (sof_offs) - { - init_get_bits(&s->gb, buf_ptr+sof_offs, (buf_end - (buf_ptr+sof_offs))*8); - s->start_code = SOF0; - if (ff_mjpeg_decode_sof(s) < 0) - return -1; - } - - sos_offs = get_bits_long(&hgb, 32); - av_log(avctx, AV_LOG_DEBUG, "sos offs: 0x%x\n", sos_offs); - sod_offs = get_bits_long(&hgb, 32); - av_log(avctx, AV_LOG_DEBUG, "sod offs: 0x%x\n", sod_offs); - if (sos_offs) - { -// init_get_bits(&s->gb, buf+sos_offs, (buf_end - (buf+sos_offs))*8); - init_get_bits(&s->gb, buf_ptr+sos_offs, field_size*8); - s->mjpb_skiptosod = (sod_offs - sos_offs - show_bits(&s->gb, 16)); - s->start_code = SOS; - ff_mjpeg_decode_sos(s); - } - - if (s->interlaced) { - s->bottom_field ^= 1; - /* if not bottom field, do not output image yet */ - if (s->bottom_field != s->interlace_polarity && second_field_offs) - { - buf_ptr = buf + second_field_offs; - second_field_offs = 0; - goto read_header; - } - } - - //XXX FIXME factorize, this looks very similar to the EOI code - - *picture= s->picture; - *data_size = sizeof(AVFrame); - - if(!s->lossless){ - picture->quality= FFMAX(FFMAX(s->qscale[0], s->qscale[1]), s->qscale[2]); - picture->qstride= 0; - picture->qscale_table= s->qscale_table; - memset(picture->qscale_table, picture->quality, (s->width+15)/16); - if(avctx->debug & FF_DEBUG_QP) - av_log(avctx, AV_LOG_DEBUG, "QP: %d\n", picture->quality); - picture->quality*= FF_QP2LAMBDA; - } - - return buf_ptr - buf; -} - -AVCodec mjpegb_decoder = { - "mjpegb", - CODEC_TYPE_VIDEO, - CODEC_ID_MJPEGB, - sizeof(MJpegDecodeContext), - ff_mjpeg_decode_init, - NULL, - ff_mjpeg_decode_end, - mjpegb_decode_frame, - CODEC_CAP_DR1, - NULL -}; |