diff options
Diffstat (limited to 'libavcodec/mjpegbdec.c')
-rw-r--r-- | libavcodec/mjpegbdec.c | 52 |
1 files changed, 26 insertions, 26 deletions
diff --git a/libavcodec/mjpegbdec.c b/libavcodec/mjpegbdec.c index 3775aa3..37d7bb8 100644 --- a/libavcodec/mjpegbdec.c +++ b/libavcodec/mjpegbdec.c @@ -2,20 +2,20 @@ * Apple MJPEG-B decoder * Copyright (c) 2002 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 */ @@ -55,6 +55,7 @@ static int mjpegb_decode_frame(AVCodecContext *avctx, buf_ptr = buf; buf_end = buf + buf_size; + s->got_picture = 0; read_header: /* reset on every SOI */ @@ -69,8 +70,7 @@ read_header: skip_bits(&hgb, 32); /* reserved zeros */ - if (get_bits_long(&hgb, 32) != MKBETAG('m','j','p','g')) - { + if (get_bits_long(&hgb, 32) != MKBETAG('m','j','p','g')) { av_log(avctx, AV_LOG_WARNING, "not mjpeg-b (bad fourcc)\n"); return AVERROR_INVALIDDATA; } @@ -84,19 +84,17 @@ read_header: dqt_offs = read_offs(avctx, &hgb, buf_end - buf_ptr, "dqt is %d and size is %d\n"); av_log(avctx, AV_LOG_DEBUG, "dqt offs: 0x%"PRIx32"\n", dqt_offs); - if (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; - if (ff_mjpeg_decode_dqt(s) < 0 && - (avctx->err_recognition & AV_EF_EXPLODE)) - return AVERROR_INVALIDDATA; + ret = ff_mjpeg_decode_dqt(s); + if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) + return ret; } dht_offs = read_offs(avctx, &hgb, buf_end - buf_ptr, "dht is %d and size is %d\n"); av_log(avctx, AV_LOG_DEBUG, "dht offs: 0x%"PRIx32"\n", dht_offs); - if (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); @@ -104,42 +102,43 @@ read_header: sof_offs = read_offs(avctx, &hgb, buf_end - buf_ptr, "sof is %d and size is %d\n"); av_log(avctx, AV_LOG_DEBUG, "sof offs: 0x%"PRIx32"\n", sof_offs); - if (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; + if ((ret = ff_mjpeg_decode_sof(s)) < 0) + return ret; } sos_offs = read_offs(avctx, &hgb, buf_end - buf_ptr, "sos is %d and size is %d\n"); av_log(avctx, AV_LOG_DEBUG, "sos offs: 0x%"PRIx32"\n", sos_offs); sod_offs = read_offs(avctx, &hgb, buf_end - buf_ptr, "sof is %d and size is %d\n"); av_log(avctx, AV_LOG_DEBUG, "sod offs: 0x%"PRIx32"\n", sod_offs); - if (sos_offs) - { + if (sos_offs) { init_get_bits(&s->gb, buf_ptr + sos_offs, 8 * FFMIN(field_size, buf_end - buf_ptr - sos_offs)); s->mjpb_skiptosod = (sod_offs - sos_offs - show_bits(&s->gb, 16)); s->start_code = SOS; - if (ff_mjpeg_decode_sos(s, NULL, NULL) < 0 && - (avctx->err_recognition & AV_EF_EXPLODE)) - return AVERROR_INVALIDDATA; + ret = ff_mjpeg_decode_sos(s, NULL, 0, NULL); + if (ret < 0 && (avctx->err_recognition & AV_EF_EXPLODE)) + return ret; } 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) - { + 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 + if(!s->got_picture) { + av_log(avctx, AV_LOG_WARNING, "no picture\n"); + return buf_size; + } + if ((ret = av_frame_ref(data, s->picture_ptr)) < 0) return ret; *got_frame = 1; @@ -162,5 +161,6 @@ AVCodec ff_mjpegb_decoder = { .close = ff_mjpeg_decode_end, .decode = mjpegb_decode_frame, .capabilities = AV_CODEC_CAP_DR1, + .max_lowres = 3, .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE, }; |