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Diffstat (limited to 'contrib/ffmpeg/libavcodec/mjpegbdec.c')
-rw-r--r--contrib/ffmpeg/libavcodec/mjpegbdec.c149
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
-};