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h264: check SPS entries directly to detect pixel format changes 

Comparing AVCodecContext.pix_fmt against the get_pixel_format() return
value has the side effect of calling the get_format() callback on each
slice. Users of the callback will probably handle hardware accelerator
initialization in the callback.
This commit is contained in:
Janne Grunau 2012-12-29 19:30:12 +01:00
parent 60e60d99ad
commit 9ac44ad9d0
1 changed files with 19 additions and 14 deletions
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33
libavcodec/h264.c
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@ -2592,7 +2592,6 @@ static int decode_slice_header(H264Context *h, H264Context *h0)
int default_ref_list_done = 0;
int last_pic_structure, last_pic_droppable;
int needs_reinit = 0;
enum AVPixelFormat pix_fmt;
/* FIXME: 2tap qpel isn't implemented for high bit depth. */
if ((s->avctx->flags2 & CODEC_FLAG2_FAST) &&
@ -2669,8 +2668,14 @@ static int decode_slice_header(H264Context *h, H264Context *h0)
if (h->pps.sps_id != h->current_sps_id ||
h->context_reinitialized ||
h0->sps_buffers[h->pps.sps_id]->new) {
SPS *new_sps = h0->sps_buffers[h->pps.sps_id];
h0->sps_buffers[h->pps.sps_id]->new = 0;
if (h->sps.chroma_format_idc != new_sps->chroma_format_idc ||
h->sps.bit_depth_luma != new_sps->bit_depth_luma)
needs_reinit = 1;
h->current_sps_id = h->pps.sps_id;
h->sps = *h0->sps_buffers[h->pps.sps_id];
@ -2709,24 +2714,17 @@ static int decode_slice_header(H264Context *h, H264Context *h0)
s->avctx->color_range = h->sps.full_range ? AVCOL_RANGE_JPEG
: AVCOL_RANGE_MPEG;
if (h->sps.colour_description_present_flag) {
if (s->avctx->colorspace != h->sps.colorspace)
needs_reinit = 1;
s->avctx->color_primaries = h->sps.color_primaries;
s->avctx->color_trc = h->sps.color_trc;
s->avctx->colorspace = h->sps.colorspace;
}
}
ret = get_pixel_format(h);
if (ret < 0)
return ret;
else
pix_fmt = ret;
if (s->avctx->pix_fmt == PIX_FMT_NONE)
s->avctx->pix_fmt = pix_fmt;
if (s->context_initialized &&
(s->width != s->avctx->width ||
s->height != s->avctx->height ||
pix_fmt != s->avctx->pix_fmt ||
needs_reinit ||
av_cmp_q(h->sps.sar, s->avctx->sample_aspect_ratio))) {
@ -2736,12 +2734,14 @@ static int decode_slice_header(H264Context *h, H264Context *h0)
return AVERROR_INVALIDDATA;
}
av_log(h->s.avctx, AV_LOG_INFO, "Reinit context to %dx%d, "
"pix_fmt: %d\n", s->width, s->height, pix_fmt);
flush_change(h);
s->avctx->pix_fmt = pix_fmt;
if ((ret = get_pixel_format(h)) < 0)
return ret;
s->avctx->pix_fmt = ret;
av_log(h->s.avctx, AV_LOG_INFO, "Reinit context to %dx%d, "
"pix_fmt: %d\n", s->width, s->height, s->avctx->pix_fmt);
if ((ret = h264_slice_header_init(h, 1)) < 0) {
av_log(h->s.avctx, AV_LOG_ERROR,
@ -2756,6 +2756,11 @@ static int decode_slice_header(H264Context *h, H264Context *h0)
"Cannot (re-)initialize context during parallel decoding.\n");
return -1;
}
if ((ret = get_pixel_format(h)) < 0)
return ret;
s->avctx->pix_fmt = ret;
if ((ret = h264_slice_header_init(h, 0)) < 0) {
av_log(h->s.avctx, AV_LOG_ERROR,
"h264_slice_header_init() failed\n");