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avcodec/theora: export cropping information instead of handling it internally

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This merges commit 1202b71269 from libav,
originally written by Anton Khirnov and skipped in
fc63d5ceb3.

 libavcodec/vp3.c | 26 +++++++++-----------------
 1 file changed, 9 insertions(+), 17 deletions(-)
This commit is contained in:
James Almer 2017-05-08 15:46:25 -03:00
parent 07596e45c5
commit a9a6d51ca4
1 changed files with 9 additions and 17 deletions
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26
libavcodec/vp3.c
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@ -2003,6 +2003,7 @@ static int vp3_decode_frame(AVCodecContext *avctx,
void *data, int *got_frame,
AVPacket *avpkt)
{
AVFrame *frame = data;
const uint8_t *buf = avpkt->data;
int buf_size = avpkt->size;
Vp3DecodeContext *s = avctx->priv_data;
@ -2176,12 +2177,12 @@ static int vp3_decode_frame(AVCodecContext *avctx,
/* output frame, offset as needed */
if ((ret = av_frame_ref(data, s->current_frame.f)) < 0)
return ret;
for (i = 0; i < 3; i++) {
AVFrame *dst = data;
int off = (s->offset_x >> (i && s->chroma_y_shift)) +
(s->offset_y >> (i && s->chroma_y_shift)) * dst->linesize[i];
dst->data[i] += off;
}
frame->crop_left = s->offset_x;
frame->crop_right = avctx->coded_width - avctx->width - s->offset_x;
frame->crop_top = s->offset_y;
frame->crop_bottom = avctx->coded_height - avctx->height - s->offset_y;
*got_frame = 1;
if (!HAVE_THREADS || !(s->avctx->active_thread_type & FF_THREAD_FRAME)) {
@ -2351,16 +2352,6 @@ static int theora_decode_header(AVCodecContext *avctx, GetBitContext *gb)
// to normal axis ([0,0] upper left)
s->offset_x = offset_x;
s->offset_y = s->height - visible_height - offset_y;
if ((s->offset_x & 0x1F) && !(avctx->flags & AV_CODEC_FLAG_UNALIGNED)) {
s->offset_x &= ~0x1F;
if (!s->offset_x_warned) {
s->offset_x_warned = 1;
av_log(avctx, AV_LOG_WARNING, "Reducing offset_x from %d to %d"
"chroma samples to preserve alignment.\n",
offset_x, s->offset_x);
}
}
}
if (colorspace == 1)
@ -2573,7 +2564,8 @@ AVCodec ff_theora_decoder = {
AV_CODEC_CAP_FRAME_THREADS,
.flush = vp3_decode_flush,
.init_thread_copy = ONLY_IF_THREADS_ENABLED(vp3_init_thread_copy),
.update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context)
.update_thread_context = ONLY_IF_THREADS_ENABLED(vp3_update_thread_context),
.caps_internal = FF_CODEC_CAP_EXPORTS_CROPPING,
};
#endif