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avcodec/magicyuvenc: write max huffman length and extradata too

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Signed-off-by: Paul B Mahol <onemda@gmail.com>
This commit is contained in:
Paul B Mahol 2018-01-25 14:55:17 +01:00
parent 1f75756c71
commit 4d93c63e78
1 changed files with 37 additions and 5 deletions
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42
libavcodec/magicyuvenc.c
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@ -57,7 +57,6 @@ typedef struct MagicYUVContext {
int planes;
uint8_t format;
AVFrame *p;
int max;
int slice_height;
int nb_slices;
int correlate;
@ -148,6 +147,7 @@ static void median_predict(MagicYUVContext *s,
static av_cold int magy_encode_init(AVCodecContext *avctx)
{
MagicYUVContext *s = avctx->priv_data;
PutByteContext pb;
int i;
switch (avctx->pix_fmt) {
@ -214,6 +214,34 @@ static av_cold int magy_encode_init(AVCodecContext *avctx)
case MEDIAN: s->predict = median_predict; break;
}
avctx->extradata_size = 32;
avctx->extradata = av_mallocz(avctx->extradata_size +
AV_INPUT_BUFFER_PADDING_SIZE);
if (!avctx->extradata) {
av_log(avctx, AV_LOG_ERROR, "Could not allocate extradata.\n");
return AVERROR(ENOMEM);
}
bytestream2_init_writer(&pb, avctx->extradata, avctx->extradata_size);
bytestream2_put_le32(&pb, MKTAG('M', 'A', 'G', 'Y'));
bytestream2_put_le32(&pb, 32);
bytestream2_put_byte(&pb, 7);
bytestream2_put_byte(&pb, s->format);
bytestream2_put_byte(&pb, 12);
bytestream2_put_byte(&pb, 0);
bytestream2_put_byte(&pb, 0);
bytestream2_put_byte(&pb, 0);
bytestream2_put_byte(&pb, 32);
bytestream2_put_byte(&pb, 0);
bytestream2_put_le32(&pb, avctx->width);
bytestream2_put_le32(&pb, avctx->height);
bytestream2_put_le32(&pb, avctx->width);
bytestream2_put_le32(&pb, avctx->height);
return 0;
}
@ -347,7 +375,7 @@ static int encode_table(AVCodecContext *avctx, uint8_t *dst,
counts[i].value = 255 - i;
}
magy_huffman_compute_bits(counts, he, 256, 16);
magy_huffman_compute_bits(counts, he, 256, 12);
calculate_codes(he);
@ -407,12 +435,16 @@ static int magy_encode_frame(AVCodecContext *avctx, AVPacket *pkt,
bytestream2_init_writer(&pb, pkt->data, pkt->size);
bytestream2_put_le32(&pb, MKTAG('M', 'A', 'G', 'Y'));
bytestream2_put_le32(&pb, 32);
bytestream2_put_byte(&pb, 7);
bytestream2_put_le32(&pb, 32); // header size
bytestream2_put_byte(&pb, 7); // version
bytestream2_put_byte(&pb, s->format);
bytestream2_put_byte(&pb, 12); // max huffman length
bytestream2_put_byte(&pb, 0);
bytestream2_put_byte(&pb, 0);
bytestream2_put_byte(&pb, 0);
bytestream2_put_le32(&pb, 0);
bytestream2_put_byte(&pb, 32); // coder type
bytestream2_put_byte(&pb, 0);
bytestream2_put_le32(&pb, avctx->width);
bytestream2_put_le32(&pb, avctx->height);