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mp_image: provide function to convert mp_image to AVFrame

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Note that this does not pass through QP information (qscale field).
The only filter for which this matters is vf_pp, and we have this
natively.
This commit is contained in:
wm4
2013-04-21 04:39:58 +02:00
parent 04f1e2dc43
commit 778e9c0633
2 changed files with 53 additions and 0 deletions
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video/mp_image.c
+50
View File
@@ -464,6 +464,30 @@ void mp_image_copy_fields_from_av_frame(struct mp_image *dst,
#endif
}
// Copy properties and data of the mp_image into the AVFrame, without taking
// care of memory management issues.
void mp_image_copy_fields_to_av_frame(struct AVFrame *dst,
struct mp_image *src)
{
dst->format = imgfmt2pixfmt(src->imgfmt);
dst->width = src->w;
dst->height = src->h;
for (int i = 0; i < 4; i++) {
dst->data[i] = src->planes[i];
dst->linesize[i] = src->stride[i];
}
dst->extended_data = dst->data;
dst->pict_type = src->pict_type;
if (src->fields & MP_IMGFIELD_INTERLACED)
dst->interlaced_frame = 1;
if (src->fields & MP_IMGFIELD_TOP_FIRST)
dst->top_field_first = 1;
if (src->fields & MP_IMGFIELD_REPEAT_FIRST)
dst->repeat_pict = 1;
}
#if HAVE_AVUTIL_REFCOUNTING
static void frame_free(void *p)
@@ -490,4 +514,30 @@ struct mp_image *mp_image_from_av_frame(struct AVFrame *av_frame)
frame_free);
}
static void free_img(void *opaque, uint8_t *data)
{
struct mp_image *img = opaque;
talloc_free(img);
}
// Convert the mp_image reference to a AVFrame reference.
// Warning: img is unreferenced (i.e. free'd). This is asymmetric to
// mp_image_from_av_frame(). It's done this way to allow marking the
// resulting AVFrame as writeable if img is the only reference (in
// other words, it's an optimization).
struct AVFrame *mp_image_to_av_frame_and_unref(struct mp_image *img)
{
struct mp_image *new_ref = mp_image_new_ref(img); // ensure it's refcounted
talloc_free(img);
AVFrame *frame = av_frame_alloc();
mp_image_copy_fields_to_av_frame(frame, new_ref);
// Caveat: if img has shared references, and all other references disappear
// at a later point, the AVFrame will still be read-only.
int flags = 0;
if (!mp_image_is_writeable(new_ref))
flags |= AV_BUFFER_FLAG_READONLY;
frame->buf[0] = av_buffer_create(NULL, 0, free_img, new_ref, flags);
return frame;
}
#endif /* HAVE_AVUTIL_REFCOUNTING */
video/mp_image.h
+3
View File
@@ -130,7 +130,10 @@ void mp_image_set_colorspace_details(struct mp_image *image,
struct AVFrame;
void mp_image_copy_fields_from_av_frame(struct mp_image *dst,
struct AVFrame *src);
void mp_image_copy_fields_to_av_frame(struct AVFrame *dst,
struct mp_image *src);
struct mp_image *mp_image_from_av_frame(struct AVFrame *av_frame);
struct AVFrame *mp_image_to_av_frame_and_unref(struct mp_image *img);
// align must be a power of two (align >= 1), v >= 0
#define MP_ALIGN_UP(v, align) FFALIGN(v, align)