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Code Issues Releases Activity

CrystalHD: Use mp4toannexb bitstream filter.

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The H.264 parser that we use to detect interlacing can only handle
an Annex B stream, so we need to actually use the filter. This is
unfortunate as the crystalhd library is already doing this conversion
internally. A future change will reorganise the decode path more
completely so that we can feed the converted stream into libcrystalhd
and avoid the second conversion.

Signed-off-by: Philip Langdale <philipl@overt.org>
This commit is contained in:
Philip Langdale 2011-06-12 20:22:20 -07:00
parent 7d2714d1ab
commit 4ac5dffc5a
1 changed files with 37 additions and 11 deletions
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48
libavcodec/crystalhd.c
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@ -514,6 +514,7 @@ static av_cold int init(AVCodecContext *avctx)
av_log(avctx, AV_LOG_WARNING,
"Cannot open the h.264 parser! Interlaced h.264 content "
"will not be detected reliably.\n");
priv->parser->flags = PARSER_FLAG_COMPLETE_FRAMES;
}
av_log(avctx, AV_LOG_VERBOSE, "CrystalHD: Init complete.\n");
@ -833,24 +834,49 @@ static int decode(AVCodecContext *avctx, void *data, int *data_size, AVPacket *a
int32_t tx_free = (int32_t)DtsTxFreeSize(dev);
if (priv->parser) {
uint8_t *pout;
int psize;
const uint8_t *in_data = avpkt->data;
uint8_t *in_data = avpkt->data;
int in_len = len;
H264Context *h = priv->parser->priv_data;
int ret = 0;
while (in_len) {
if (priv->bsfc) {
ret = av_bitstream_filter_filter(priv->bsfc, avctx, NULL,
&in_data, &in_len,
avpkt->data, len, 0);
}
if (ret >= 0) {
uint8_t *pout;
int psize;
int index;
H264Context *h = priv->parser->priv_data;
index = av_parser_parse2(priv->parser, avctx, &pout, &psize,
in_data, in_len, avctx->pkt->pts,
avctx->pkt->dts, 0);
in_data += index;
in_len -= index;
if (index < 0) {
av_log(avctx, AV_LOG_WARNING,
"CrystalHD: Failed to parse h.264 packet to "
"detect interlacing.\n");
} else if (index != in_len) {
av_log(avctx, AV_LOG_WARNING,
"CrystalHD: Failed to parse h.264 packet "
"completely. Interlaced frames may be "
"incorrectly detected\n.");
} else {
av_log(avctx, AV_LOG_VERBOSE,
"CrystalHD: parser picture type %d\n",
h->s.picture_structure);
pic_type = h->s.picture_structure;
}
} else {
av_log(avctx, AV_LOG_WARNING,
"CrystalHD: mp4toannexb filter failed to filter "
"packet. Interlaced frames may be incorrectly "
"detected.\n");
}
if (ret > 0) {
av_freep(&in_data);
}
av_log(avctx, AV_LOG_VERBOSE,
"CrystalHD: parser picture type %d\n",
h->s.picture_structure);
pic_type = h->s.picture_structure;
}
if (len < tx_free - 1024) {