diff options
Diffstat (limited to 'libavcodec/avpacket.c')
-rw-r--r-- | libavcodec/avpacket.c | 103 |
1 files changed, 92 insertions, 11 deletions
diff --git a/libavcodec/avpacket.c b/libavcodec/avpacket.c index 82890c3676..ada73a598c 100644 --- a/libavcodec/avpacket.c +++ b/libavcodec/avpacket.c @@ -26,12 +26,21 @@ void av_destruct_packet_nofree(AVPacket *pkt) { pkt->data = NULL; pkt->size = 0; + pkt->side_data = NULL; + pkt->side_data_elems = 0; } void av_destruct_packet(AVPacket *pkt) { + int i; + av_free(pkt->data); pkt->data = NULL; pkt->size = 0; + + for (i = 0; i < pkt->side_data_elems; i++) + av_free(pkt->side_data[i].data); + av_freep(&pkt->side_data); + pkt->side_data_elems = 0; } void av_init_packet(AVPacket *pkt) @@ -44,6 +53,8 @@ void av_init_packet(AVPacket *pkt) pkt->flags = 0; pkt->stream_index = 0; pkt->destruct= NULL; + pkt->side_data = NULL; + pkt->side_data_elems = 0; } int av_new_packet(AVPacket *pkt, int size) @@ -89,23 +100,52 @@ int av_grow_packet(AVPacket *pkt, int grow_by) return 0; } +#define DUP_DATA(dst, src, size, padding) \ + do { \ + void *data; \ + if (padding) { \ + if ((unsigned)(size) > (unsigned)(size) + FF_INPUT_BUFFER_PADDING_SIZE) \ + goto failed_alloc; \ + data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); \ + } else { \ + data = av_malloc(size); \ + } \ + if (!data) \ + goto failed_alloc; \ + memcpy(data, src, size); \ + if (padding) \ + memset((uint8_t*)data + size, 0, FF_INPUT_BUFFER_PADDING_SIZE); \ + dst = data; \ + } while(0) + int av_dup_packet(AVPacket *pkt) { + AVPacket tmp_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; + tmp_pkt = *pkt; + + pkt->data = NULL; + pkt->side_data = NULL; + DUP_DATA(pkt->data, tmp_pkt.data, pkt->size, 1); pkt->destruct = av_destruct_packet; + + if (pkt->side_data_elems) { + int i; + + DUP_DATA(pkt->side_data, tmp_pkt.side_data, + pkt->side_data_elems * sizeof(*pkt->side_data), 0); + memset(pkt->side_data, 0, pkt->side_data_elems * sizeof(*pkt->side_data)); + for (i = 0; i < pkt->side_data_elems; i++) { + DUP_DATA(pkt->side_data[i].data, tmp_pkt.side_data[i].data, + pkt->side_data[i].size, 1); + } + } } return 0; +failed_alloc: + av_destruct_packet(pkt); + return AVERROR(ENOMEM); } void av_free_packet(AVPacket *pkt) @@ -113,5 +153,46 @@ void av_free_packet(AVPacket *pkt) if (pkt) { if (pkt->destruct) pkt->destruct(pkt); pkt->data = NULL; pkt->size = 0; + pkt->side_data = NULL; + pkt->side_data_elems = 0; + } +} + +uint8_t* av_packet_new_side_data(AVPacket *pkt, enum AVPacketSideDataType type, + int size) +{ + int elems = pkt->side_data_elems; + + if ((unsigned)elems + 1 > INT_MAX / sizeof(*pkt->side_data)) + return NULL; + if ((unsigned)size > INT_MAX - FF_INPUT_BUFFER_PADDING_SIZE) + return NULL; + + pkt->side_data = av_realloc(pkt->side_data, (elems + 1) * sizeof(*pkt->side_data)); + if (!pkt->side_data) + return NULL; + + pkt->side_data[elems].data = av_malloc(size + FF_INPUT_BUFFER_PADDING_SIZE); + if (!pkt->side_data[elems].data) + return NULL; + pkt->side_data[elems].size = size; + pkt->side_data[elems].type = type; + pkt->side_data_elems++; + + return pkt->side_data[elems].data; +} + +uint8_t* av_packet_get_side_data(AVPacket *pkt, enum AVPacketSideDataType type, + int *size) +{ + int i; + + for (i = 0; i < pkt->side_data_elems; i++) { + if (pkt->side_data[i].type == type) { + if (size) + *size = pkt->side_data[i].size; + return pkt->side_data[i].data; + } } + return NULL; } |