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Merge pull request #5 from berg/parse-scaling-list

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Parse scaling list from SPS
This commit is contained in:
Sergey 2015-07-03 01:22:50 +03:00
parent 087e5358e2 9ebfcc1978
commit 859540db60
1 changed files with 27 additions and 3 deletions
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30
ngx_rtmp_codec_module.c
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@ -359,7 +359,8 @@ ngx_rtmp_codec_parse_avc_header(ngx_rtmp_session_t *s, ngx_chain_t *in)
{
ngx_uint_t profile_idc, width, height, crop_left, crop_right,
crop_top, crop_bottom, frame_mbs_only, n, cf_idc,
num_ref_frames;
num_ref_frames, sl_size, sl_index, sl_udelta;
ngx_int_t sl_last, sl_next, sl_delta;
ngx_rtmp_codec_ctx_t *ctx;
ngx_rtmp_bit_reader_t br;
@ -437,11 +438,34 @@ ngx_rtmp_codec_parse_avc_header(ngx_rtmp_session_t *s, ngx_chain_t *in)
/* seq scaling list present */
if (ngx_rtmp_bit_read(&br, 1)) {
/* TODO: scaling_list()
/* scaling list */
if (n < 6) {
sl_size = 16;
} else {
sl_size = 64;
}
sl_last = 8;
sl_next = 8;
for (sl_index = 0; sl_index < sl_size; sl_index++) {
if (sl_next != 0) {
/* convert to signed: (-1)**k+1 * ceil(k/2) */
sl_udelta = ngx_rtmp_bit_read_golomb(&br);
sl_delta = (sl_udelta + 1) >> 1;
if ((sl_udelta & 1) == 0) {
sl_delta = -sl_delta;
}
sl_next = (sl_last + sl_delta + 256) % 256;
if (sl_next != 0) {
sl_last = sl_next;
}
}
}
*/
}
}
}