diff options
Diffstat (limited to 'libavcodec/options.c')
-rw-r--r-- | libavcodec/options.c | 60 |
1 files changed, 60 insertions, 0 deletions
diff --git a/libavcodec/options.c b/libavcodec/options.c index 89b25483c2..04fd3ba496 100644 --- a/libavcodec/options.c +++ b/libavcodec/options.c @@ -471,3 +471,63 @@ AVCodecContext *avcodec_alloc_context(void){ return avcodec_alloc_context2(AVMEDIA_TYPE_UNKNOWN); } +int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src) +{ + if (dest->codec) { // check that the dest context is uninitialized + av_log(dest, AV_LOG_ERROR, + "Tried to copy AVCodecContext %p into already-initialized %p\n", + src, dest); + return AVERROR(EINVAL); + } + memcpy(dest, src, sizeof(*dest)); + + /* set values specific to opened codecs back to their default state */ + dest->priv_data = NULL; + dest->codec = NULL; + dest->palctrl = NULL; + dest->slice_offset = NULL; + dest->internal_buffer = NULL; + dest->hwaccel = NULL; + dest->execute = NULL; + dest->execute2 = NULL; + dest->reget_buffer = NULL; + dest->thread_opaque = NULL; + + /* reallocate values that should be allocated separately */ + dest->rc_eq = NULL; + dest->extradata = NULL; + dest->intra_matrix = NULL; + dest->inter_matrix = NULL; + dest->rc_override = NULL; + if (src->rc_eq) { + dest->rc_eq = av_strdup(src->rc_eq); + if (!dest->rc_eq) + return AVERROR(ENOMEM); + } + +#define alloc_and_copy_or_fail(obj, size, pad) \ + if (src->obj && size > 0) { \ + dest->obj = av_malloc(size + pad); \ + if (!dest->obj) \ + goto fail; \ + memcpy(dest->obj, src->obj, size); \ + if (pad) \ + memset(((uint8_t *) dest->obj) + size, 0, pad); \ + } + alloc_and_copy_or_fail(extradata, src->extradata_size, + FF_INPUT_BUFFER_PADDING_SIZE); + alloc_and_copy_or_fail(intra_matrix, 64 * sizeof(int16_t), 0); + alloc_and_copy_or_fail(inter_matrix, 64 * sizeof(int16_t), 0); + alloc_and_copy_or_fail(rc_override, src->rc_override_count * sizeof(*src->rc_override), 0); +#undef alloc_and_copy_or_fail + + return 0; + +fail: + av_freep(&dest->rc_override); + av_freep(&dest->intra_matrix); + av_freep(&dest->inter_matrix); + av_freep(&dest->extradata); + av_freep(&dest->rc_eq); + return AVERROR(ENOMEM); +} |