diff options
Diffstat (limited to 'libavformat/rtpenc_jpeg.c')
| -rw-r--r-- | libavformat/rtpenc_jpeg.c | 60 |
1 files changed, 48 insertions, 12 deletions
diff --git a/libavformat/rtpenc_jpeg.c b/libavformat/rtpenc_jpeg.c index b8c880a..a6f2b32 100644 --- a/libavformat/rtpenc_jpeg.c +++ b/libavformat/rtpenc_jpeg.c @@ -2,32 +2,33 @@ * RTP JPEG-compressed video Packetizer, RFC 2435 * Copyright (c) 2012 Samuel Pitoiset * - * 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 */ #include "libavcodec/bytestream.h" #include "libavcodec/mjpeg.h" +#include "libavcodec/jpegtables.h" #include "libavutil/intreadwrite.h" #include "rtpenc.h" void ff_rtp_send_jpeg(AVFormatContext *s1, const uint8_t *buf, int size) { RTPMuxContext *s = s1->priv_data; - const uint8_t *qtables = NULL; + const uint8_t *qtables[4] = { NULL }; int nb_qtables = 0; uint8_t type; uint8_t w, h; @@ -40,8 +41,8 @@ void ff_rtp_send_jpeg(AVFormatContext *s1, const uint8_t *buf, int size) s->timestamp = s->cur_timestamp; /* convert video pixel dimensions from pixels to blocks */ - w = (s1->streams[0]->codec->width + 7) >> 3; - h = (s1->streams[0]->codec->height + 7) >> 3; + w = FF_CEIL_RSHIFT(s1->streams[0]->codec->width, 3); + h = FF_CEIL_RSHIFT(s1->streams[0]->codec->height, 3); /* get the pixel format type or fail */ if (s1->streams[0]->codec->pix_fmt == AV_PIX_FMT_YUVJ422P || @@ -63,30 +64,65 @@ void ff_rtp_send_jpeg(AVFormatContext *s1, const uint8_t *buf, int size) continue; if (buf[i + 1] == DQT) { - if (buf[i + 4]) + int tables, j; + if (buf[i + 4] & 0xF0) av_log(s1, AV_LOG_WARNING, "Only 8-bit precision is supported.\n"); /* a quantization table is 64 bytes long */ - nb_qtables = AV_RB16(&buf[i + 2]) / 65; - if (i + 4 + nb_qtables * 65 > size) { + tables = AV_RB16(&buf[i + 2]) / 65; + if (i + 5 + tables * 65 > size) { av_log(s1, AV_LOG_ERROR, "Too short JPEG header. Aborted!\n"); return; } + if (nb_qtables + tables > 4) { + av_log(s1, AV_LOG_ERROR, "Invalid number of quantisation tables\n"); + return; + } - qtables = &buf[i + 4]; + for (j = 0; j < tables; j++) + qtables[nb_qtables + j] = buf + i + 5 + j * 65; + nb_qtables += tables; } else if (buf[i + 1] == SOF0) { if (buf[i + 14] != 17 || buf[i + 17] != 17) { av_log(s1, AV_LOG_ERROR, "Only 1x1 chroma blocks are supported. Aborted!\n"); return; } + } else if (buf[i + 1] == DHT) { + if ( AV_RB16(&buf[i + 2]) < 418 + || i + 420 >= size + || buf[i + 4] != 0x00 + || buf[i + 33] != 0x01 + || buf[i + 62] != 0x10 + || buf[i + 241] != 0x11 + || memcmp(buf + i + 5, avpriv_mjpeg_bits_dc_luminance + 1, 16) + || memcmp(buf + i + 21, avpriv_mjpeg_val_dc, 12) + || memcmp(buf + i + 34, avpriv_mjpeg_bits_dc_chrominance + 1, 16) + || memcmp(buf + i + 50, avpriv_mjpeg_val_dc, 12) + || memcmp(buf + i + 63, avpriv_mjpeg_bits_ac_luminance + 1, 16) + || memcmp(buf + i + 79, avpriv_mjpeg_val_ac_luminance, 162) + || memcmp(buf + i + 242, avpriv_mjpeg_bits_ac_chrominance + 1, 16) + || memcmp(buf + i + 258, avpriv_mjpeg_val_ac_chrominance, 162)) { + av_log(s1, AV_LOG_ERROR, + "RFC 2435 requires standard Huffman tables for jpeg\n"); + return; + } } else if (buf[i + 1] == SOS) { /* SOS is last marker in the header */ i += AV_RB16(&buf[i + 2]) + 2; + if (i > size) { + av_log(s1, AV_LOG_ERROR, + "Insufficient data. Aborted!\n"); + return; + } break; } } + if (nb_qtables && nb_qtables != 2) + av_log(s1, AV_LOG_WARNING, + "RFC 2435 suggests two quantization tables, %d provided\n", + nb_qtables); /* skip JPEG header */ buf += i; @@ -125,7 +161,7 @@ void ff_rtp_send_jpeg(AVFormatContext *s1, const uint8_t *buf, int size) bytestream_put_be16(&p, 64 * nb_qtables); for (i = 0; i < nb_qtables; i++) - bytestream_put_buffer(&p, &qtables[65 * i + 1], 64); + bytestream_put_buffer(&p, qtables[i], 64); } /* copy payload data */ |
