Cover HEVC PPS flags and incompatible AMF startup output

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evgeny committed 2026-10-18 17:21:05 +02:00
1 parent f8827a9466
commit aedb0e6170
2 files changed
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@@ -156,7 +156,58 @@ static void bitstreams(void) {
}
puts("video: real AVC Baseline/CB and HEVC IDR, multi-picture DPB, atomic malformed parse PASS");
}
static void put_bits(uint8_t *data, unsigned *at, unsigned value, unsigned count) {
while (count--) { data[*at / 8] |= ((value >> count) & 1u) << (7 - *at % 8); ++*at; }
}
/* Только синтаксис заголовков: entropy payload здесь не нужен. SPS fixture: CTU32, 40*23 CTB, address=10 bits. */
static size_t hevc_segment(uint8_t *data, unsigned first, unsigned enabled, unsigned dependent,
unsigned output, unsigned visible, unsigned extra, unsigned address) {
memset(data, 0, 16); data[2] = 1; data[3] = 40; data[4] = 1;
unsigned at = 40;
put_bits(data, &at, first, 1); put_bits(data, &at, 0, 1); put_bits(data, &at, 1, 1); // first, no_output_prior, PPS id=0.
if (!first) {
if (enabled) put_bits(data, &at, dependent, 1);
put_bits(data, &at, address, 10);
}
if (!dependent) {
put_bits(data, &at, 0, extra); put_bits(data, &at, 3, 3); // reserved bits, I slice ue(2).
if (output) put_bits(data, &at, visible, 1);
}
put_bits(data, &at, 1, 1);
return (at + 7) / 8;
}
static void hevc_pps_flags(void) {
uint8_t bytes[8192]; struct call_video_bitstream stream;
int size = call_video_probe_key(CALL_VIDEO_H265, CALL_VIDEO_MAIN, bytes, sizeof(bytes)); CHECK(size > 0);
size_t pps = 0, config = 4 + ((unsigned)bytes[2] << 8 | bytes[3]);
for (size_t i = 4; i + 5 < config; ++i)
if (!bytes[i] && !bytes[i + 1] && bytes[i + 2] == 1 && bytes[i + 3] == 68) pps = i + 5;
CHECK(pps && bytes[pps] == 0xc0); // Оба id=0, slice flags отсутствуют.
bytes[pps] |= 0x20; // Реальный IDR остаётся валиден, когда PPS разрешает dependent segments.
CHECK(!call_video_inspect_key(CALL_VIDEO_H265, bytes, size, &stream));
for (unsigned flags = 0; flags < 4; ++flags) for (unsigned extra = 0; extra <= 3; extra += 3) {
unsigned dependent = flags & 1, output = flags >> 1;
bytes[pps] = 0xc0 | dependent << 5 | output << 4 | extra << 1;
size_t end = config + hevc_segment(bytes + config, 1, dependent, 0, output, 1, extra, 0);
CHECK(!call_video_inspect_key(CALL_VIDEO_H265, bytes, end, &stream));
size_t next = end + hevc_segment(bytes + end, 0, dependent, 0, output, 1, extra, 1);
CHECK(!call_video_inspect_key(CALL_VIDEO_H265, bytes, next, &stream));
next = end + hevc_segment(bytes + end, 0, dependent, dependent, output, 1, extra, 1);
CHECK(!call_video_inspect_key(CALL_VIDEO_H265, bytes, next, &stream));
for (unsigned address = 0; address <= 1023; address += 1023) {
next = end + hevc_segment(bytes + end, 0, dependent, dependent, output, 1, extra, address);
CHECK(call_video_inspect_key(CALL_VIDEO_H265, bytes, next, &stream) < 0);
}
if (output) {
next = end + hevc_segment(bytes + end, 0, dependent, 0, output, 0, extra, 1);
CHECK(call_video_inspect_key(CALL_VIDEO_H265, bytes, next, &stream) < 0);
end = config + hevc_segment(bytes + config, 1, dependent, 0, output, 0, extra, 0);
CHECK(call_video_inspect_key(CALL_VIDEO_H265, bytes, end, &stream) < 0);
}
}
puts("video: HEVC PPS flags, independent/dependent IDR segments, output flag and CTB address validation PASS");
}
int main(void) {
debug_config_init(); debug_set_level(DEBUG_LEVEL_ERROR);
capabilities(); envelopes(); roundtrip(); rejected(); bitstreams(); return 0;
capabilities(); envelopes(); roundtrip(); rejected(); bitstreams(); hevc_pps_flags(); return 0;
}