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Merge commit '4baba6c813'

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* commit '4baba6c813':
  h264_parser: Fix POC parsing for the case where MMCO_RESET is present.

Conflicts:
	libavcodec/h264.c

Merged-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2013-10-16 12:51:26 +02:00
commit f7f74a37b8
3 changed files with 154 additions and 45 deletions
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110
libavcodec/h264_parser.c
View file

@ -120,6 +120,75 @@ found:
return i - (state & 5) - 3 * (state > 7);
}
static int scan_mmco_reset(AVCodecParserContext *s)
{
H264Context *h = s->priv_data;
h->slice_type_nos = s->pict_type & 3;
if (h->pps.redundant_pic_cnt_present)
get_ue_golomb(&h->gb); // redundant_pic_count
if (ff_set_ref_count(h) < 0)
return AVERROR_INVALIDDATA;
if (h->slice_type_nos != AV_PICTURE_TYPE_I) {
int list;
for (list = 0; list < h->list_count; list++) {
if (get_bits1(&h->gb)) {
int index;
for (index = 0; ; index++) {
unsigned int reordering_of_pic_nums_idc = get_ue_golomb_31(&h->gb);
if (reordering_of_pic_nums_idc < 3)
get_ue_golomb(&h->gb);
else if (reordering_of_pic_nums_idc > 3) {
av_log(h->avctx, AV_LOG_ERROR,
"illegal reordering_of_pic_nums_idc %d\n",
reordering_of_pic_nums_idc);
return AVERROR_INVALIDDATA;
} else
break;
if (index >= h->ref_count[list]) {
av_log(h->avctx, AV_LOG_ERROR, "reference count overflow\n");
return AVERROR_INVALIDDATA;
}
}
}
}
}
if ((h->pps.weighted_pred && h->slice_type_nos == AV_PICTURE_TYPE_P) ||
(h->pps.weighted_bipred_idc == 1 && h->slice_type_nos == AV_PICTURE_TYPE_B))
ff_pred_weight_table(h);
if (get_bits1(&h->gb)) { // adaptive_ref_pic_marking_mode_flag
int i;
for (i = 0; i < MAX_MMCO_COUNT; i++) {
MMCOOpcode opcode = get_ue_golomb_31(&h->gb);
if (opcode > (unsigned) MMCO_LONG) {
av_log(h->avctx, AV_LOG_ERROR,
"illegal memory management control operation %d\n",
opcode);
return AVERROR_INVALIDDATA;
}
if (opcode == MMCO_END)
return 0;
else if (opcode == MMCO_RESET)
return 1;
if (opcode == MMCO_SHORT2UNUSED || opcode == MMCO_SHORT2LONG)
get_ue_golomb(&h->gb);
if (opcode == MMCO_SHORT2LONG || opcode == MMCO_LONG2UNUSED ||
opcode == MMCO_LONG || opcode == MMCO_SET_MAX_LONG)
get_ue_golomb_31(&h->gb);
}
}
return 0;
}
/**
* Parse NAL units of found picture and decode some basic information.
*
@ -136,7 +205,7 @@ static inline int parse_nal_units(AVCodecParserContext *s,
const uint8_t *buf_end = buf + buf_size;
unsigned int pps_id;
unsigned int slice_type;
int state = -1;
int state = -1, got_reset = 0;
const uint8_t *ptr;
int q264 = buf_size >=4 && !memcmp("Q264", buf, 4);
int field_poc[2];
@ -180,8 +249,16 @@ static inline int parse_nal_units(AVCodecParserContext *s,
case NAL_SLICE:
case NAL_IDR_SLICE:
// Do not walk the whole buffer just to decode slice header
if (src_length > 60)
src_length = 60;
if (state & 0x1f == NAL_IDR_SLICE || (state >> 5) & 0x3 == 0) {
/* IDR or disposable slice
* No need to decode many bytes because MMCOs shall not be present. */
if (src_length > 60)
src_length = 60;
} else {
/* To decode up to MMCOs */
if (src_length > 1000)
src_length = 1000;
}
break;
}
ptr = ff_h264_decode_nal(h, buf, &dst_length, &consumed, src_length);
@ -267,16 +344,33 @@ static inline int parse_nal_units(AVCodecParserContext *s,
h->delta_poc[1] = get_se_golomb(&h->gb);
}
/* Decode POC of this picture. */
/* Decode POC of this picture.
* The prev_ values needed for decoding POC of the next picture are not set here. */
field_poc[0] = field_poc[1] = INT_MAX;
ff_init_poc(h, field_poc, &s->output_picture_number);
/* Continue parsing to check if MMCO_RESET is present.
* FIXME: MMCO_RESET could appear in non-first slice.
* Maybe, we should parse all undisposable non-IDR slice of this
* picture until encountering MMCO_RESET in a slice of it. */
if (h->nal_ref_idc && h->nal_unit_type != NAL_IDR_SLICE) {
got_reset = scan_mmco_reset(s);
if (got_reset < 0)
return got_reset;
}
/* Set up the prev_ values for decoding POC of the next picture. */
h->prev_frame_num = h->frame_num;
h->prev_frame_num_offset = h->frame_num_offset;
h->prev_frame_num = got_reset ? 0 : h->frame_num;
h->prev_frame_num_offset = got_reset ? 0 : h->frame_num_offset;
if (h->nal_ref_idc != 0) {
h->prev_poc_msb = h->poc_msb;
h->prev_poc_lsb = h->poc_lsb;
if (!got_reset) {
h->prev_poc_msb = h->poc_msb;
h->prev_poc_lsb = h->poc_lsb;
} else {
h->prev_poc_msb = 0;
h->prev_poc_lsb =
h->picture_structure == PICT_BOTTOM_FIELD ? 0 : field_poc[0];
}
}
if (h->sps.pic_struct_present_flag) {