| /* |
| * Copyright (c) 2008 Reimar Döffinger |
| * |
| * 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 |
| */ |
| |
| #include "libavutil/common.h" |
| #include "libavutil/intreadwrite.h" |
| #include "bsf.h" |
| #include "bsf_internal.h" |
| |
| static int text2movsub(AVBSFContext *ctx, AVPacket *out) |
| { |
| AVPacket *in; |
| int ret = 0; |
| |
| ret = ff_bsf_get_packet(ctx, &in); |
| if (ret < 0) |
| return ret; |
| |
| if (in->size > 0xffff) { |
| ret = AVERROR_INVALIDDATA; |
| goto fail; |
| } |
| |
| ret = av_new_packet(out, in->size + 2); |
| if (ret < 0) { |
| ret = AVERROR(ENOMEM); |
| goto fail; |
| } |
| |
| ret = av_packet_copy_props(out, in); |
| if (ret < 0) |
| goto fail; |
| |
| AV_WB16(out->data, in->size); |
| memcpy(out->data + 2, in->data, in->size); |
| |
| fail: |
| if (ret < 0) |
| av_packet_unref(out); |
| av_packet_free(&in); |
| return ret; |
| } |
| |
| const AVBitStreamFilter ff_text2movsub_bsf = { |
| .name = "text2movsub", |
| .filter = text2movsub, |
| }; |
| |
| static int mov2textsub(AVBSFContext *ctx, AVPacket *pkt) |
| { |
| int ret = 0; |
| |
| ret = ff_bsf_get_packet_ref(ctx, pkt); |
| if (ret < 0) |
| return ret; |
| |
| if (pkt->size < 2) { |
| av_packet_unref(pkt); |
| return AVERROR_INVALIDDATA; |
| } |
| |
| pkt->size = FFMIN(pkt->size - 2, AV_RB16(pkt->data)); |
| pkt->data += 2; |
| |
| return 0; |
| } |
| |
| const AVBitStreamFilter ff_mov2textsub_bsf = { |
| .name = "mov2textsub", |
| .filter = mov2textsub, |
| }; |