This commit adds the avio_get_dyn_buf function which allows accessing the content of a DynBuffer without destroying it.
This is required in matroskaenc for preliminary writing (correct) mkv headers. Context for this change is fixing regression bug #5977. --- libavformat/avio.h | 12 ++++++++++++ libavformat/aviobuf.c | 17 +++++++++++++++++ 2 files changed, 29 insertions(+) diff --git a/libavformat/avio.h b/libavformat/avio.h index b1ce1d1..f2b9a6f 100644 --- a/libavformat/avio.h +++ b/libavformat/avio.h @@ -704,6 +704,18 @@ int avio_closep(AVIOContext **s); int avio_open_dyn_buf(AVIOContext **s); /** + * Return the written size and a pointer to the buffer. + * The AVIOContext stream is left intact. + * The buffer must NOT be freed. + * No padding is added to the buffer. + * + * @param s IO context + * @param pbuffer pointer to a byte buffer + * @return the length of the byte buffer + */ +int avio_get_dyn_buf(AVIOContext *s, uint8_t **pbuffer); + +/** * Return the written size and a pointer to the buffer. The buffer * must be freed with av_free(). * Padding of AV_INPUT_BUFFER_PADDING_SIZE is added to the buffer. diff --git a/libavformat/aviobuf.c b/libavformat/aviobuf.c index 134d627..bf7e5f8 100644 --- a/libavformat/aviobuf.c +++ b/libavformat/aviobuf.c @@ -1277,6 +1277,23 @@ int ffio_open_dyn_packet_buf(AVIOContext **s, int max_packet_size) return url_open_dyn_buf_internal(s, max_packet_size); } +int avio_get_dyn_buf(AVIOContext *s, uint8_t **pbuffer) +{ + DynBuffer *d; + + if (!s) { + *pbuffer = NULL; + return 0; + } + + avio_flush(s); + + d = s->opaque; + *pbuffer = d->buffer; + + return d->size; +} + int avio_close_dyn_buf(AVIOContext *s, uint8_t **pbuffer) { DynBuffer *d; -- 2.10.2.windows.1 _______________________________________________ ffmpeg-devel mailing list ffmpeg-devel@ffmpeg.org http://ffmpeg.org/mailman/listinfo/ffmpeg-devel