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);
}
int avcodec_copy_context(AVCodecContext *dest, const AVCodecContext *src)
{
const AVCodec *orig_codec = dest->codec;
uint8_t *orig_priv_data = dest->priv_data;
if (avcodec_is_open(dest)) { // 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);
}
av_opt_free(dest);
av_freep(&dest->rc_override);
av_freep(&dest->intra_matrix);
av_freep(&dest->inter_matrix);
av_freep(&dest->extradata);
av_freep(&dest->subtitle_header);
memcpy(dest, src, sizeof(*dest));
av_opt_copy(dest, src);
dest->priv_data = orig_priv_data;
dest->codec = orig_codec;
if (orig_priv_data && src->codec && src->codec->priv_class &&
dest->codec && dest->codec->priv_class)
av_opt_copy(orig_priv_data, src->priv_data);
/* set values specific to opened codecs back to their default state */
dest->slice_offset = NULL;
dest->hwaccel = NULL;
dest->internal = NULL;
#if FF_API_CODED_FRAME
FF_DISABLE_DEPRECATION_WARNINGS
dest->coded_frame = NULL;
FF_ENABLE_DEPRECATION_WARNINGS
#endif
/* reallocate values that should be allocated separately */
dest->extradata = NULL;
dest->intra_matrix = NULL;
dest->inter_matrix = NULL;
dest->rc_override = NULL;
dest->subtitle_header = NULL;
dest->hw_frames_ctx = NULL;
#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,
AV_INPUT_BUFFER_PADDING_SIZE);
dest->extradata_size = src->extradata_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);
alloc_and_copy_or_fail(subtitle_header, src->subtitle_header_size, 1);
av_assert0(dest->subtitle_header_size == src->subtitle_header_size);
#undef alloc_and_copy_or_fail
if (src->hw_frames_ctx) {
dest->hw_frames_ctx = av_buffer_ref(src->hw_frames_ctx);
if (!dest->hw_frames_ctx)
goto fail;
}
return 0;
fail:
av_freep(&dest->subtitle_header);
av_freep(&dest->rc_override);
av_freep(&dest->intra_matrix);
av_freep(&dest->inter_matrix);
av_freep(&dest->extradata);
av_buffer_unref(&dest->hw_frames_ctx);
dest->subtitle_header_size = 0;
dest->extradata_size = 0;
av_opt_free(dest);
return AVERROR(ENOMEM);
}
