diff options
Diffstat (limited to 'libavcodec/avpacket.c')
-rw-r--r-- | libavcodec/avpacket.c | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c new file mode 100644 index 0000000000..107afb3817 --- /dev/null +++ b/libavcodec/avpacket.c @@ -0,0 +1,82 @@ +/* + * AVPacket functions for libavcodec + * Copyright (c) 2000, 2001, 2002 Fabrice Bellard + * + * 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 "avcodec.h" + + +void av_destruct_packet_nofree(AVPacket *pkt) +{ + pkt->data = NULL; pkt->size = 0; +} + +void av_destruct_packet(AVPacket *pkt) +{ + av_free(pkt->data); + pkt->data = NULL; pkt->size = 0; +} + +void av_init_packet(AVPacket *pkt) +{ + pkt->pts = AV_NOPTS_VALUE; + pkt->dts = AV_NOPTS_VALUE; + pkt->pos = -1; + pkt->duration = 0; + pkt->convergence_duration = 0; + pkt->flags = 0; + pkt->stream_index = 0; + pkt->destruct= av_destruct_packet_nofree; +} + +int av_new_packet(AVPacket *pkt, int size) +{ + uint8_t *data; + if((unsigned)size > (unsigned)size + FF_INPUT_BUFFER_PADDING_SIZE) + return AVERROR(ENOMEM); + data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); + if (!data) + return AVERROR(ENOMEM); + memset(data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); + + av_init_packet(pkt); + pkt->data = data; + pkt->size = size; + pkt->destruct = av_destruct_packet; + return 0; +} + +int av_dup_packet(AVPacket *pkt) +{ + if (((pkt->destruct == av_destruct_packet_nofree) || (pkt->destruct == NULL)) && pkt->data) { + uint8_t *data; + /* We duplicate the packet and don't forget to add the padding again. */ + if((unsigned)pkt->size > (unsigned)pkt->size + FF_INPUT_BUFFER_PADDING_SIZE) + return AVERROR(ENOMEM); + data = av_malloc(pkt->size + FF_INPUT_BUFFER_PADDING_SIZE); + if (!data) { + return AVERROR(ENOMEM); + } + memcpy(data, pkt->data, pkt->size); + memset(data + pkt->size, 0, FF_INPUT_BUFFER_PADDING_SIZE); + pkt->data = data; + pkt->destruct = av_destruct_packet; + } + return 0; +} |