public static string GetFrameLine(AVPacket pkt)
{
//pkt.data
uint crc = BitConverter.ToUInt32(new CRC32().ComputeHash(pkt.data_base.Select(Item => (byte)Item).ToArray(), pkt.data_offset, pkt.size), 0);
//snprintf(buf, sizeof(buf), "%d, %10"PRId64", %10"PRId64", %8d, %8d, 0x%08x",
// pkt->stream_index, pkt->dts, pkt->pts, pkt->duration, pkt->size, crc);
//if (pkt->flags != AV_PKT_FLAG_KEY)
// av_strlcatf(buf, sizeof(buf), ", F=0x%0X", pkt->flags);
//if (pkt->side_data_elems)
// av_strlcatf(buf, sizeof(buf), ", S=%d", pkt->side_data_elems);
//av_strlcatf(buf, sizeof(buf), "\n");
//avio_write(s->pb, buf, strlen(buf));
//avio_flush(s->pb);
return String.Format(
"{0}, {1}, {2}, {3}, {4}, 0x{5:X8}",
pkt.stream_index, pkt.dts, pkt.pts, pkt.duration, pkt.size, crc
);
}
public int decode_frame(AVFrame data, int[] data_size, AVPacket avpkt)
{
/* const uint8_t * */
byte[] buf_base = avpkt.data_base;
int buf_offset = avpkt.data_offset;
int buf_size = avpkt.size;
//AVFrame pict = data;
int buf_index;
// ???????????????????????????????????????
// s.flags= avctx.flags;
// s.flags2= avctx.flags2;
/* end of stream, output what is still in the buffers */
bool loop = true;
// out:
do
{
loop = false;
if (buf_size == 0)
{
AVFrame @out;
int i, out_idx;
// FIXME factorize this with the output code below
@out = this.delayed_pic[0];
out_idx = 0;
for (i = 1; this.delayed_pic[i] != null
&& 0 == this.delayed_pic[i].key_frame
&& 0 == this.delayed_pic[i].mmco_reset; i++)
if (this.delayed_pic[i].poc < @out.poc)
{
@out = this.delayed_pic[i];
out_idx = i;
}
for (i = out_idx; this.delayed_pic[i] != null; i++)
this.delayed_pic[i] = this.delayed_pic[i + 1];
if (@out != null)
{
data_size[0] = 1;
@out.copyTo(displayPicture);
// DebugTool.dumpFrameData(displayPicture);
}
return 0;
}
buf_index = this.decode_nal_units(buf_base, buf_offset, buf_size);
if (buf_index < 0)
{
return -8;
}
if (null == s.current_picture_ptr
&& this.nal_unit_type == NAL_END_SEQUENCE)
{
buf_size = 0;
loop = true;
}
} while (loop);
if (0 == (s.flags2 & MpegEncContext.CODEC_FLAG2_CHUNKS) && null == s.current_picture_ptr)
{
if (s.skip_frame >= MpegEncContext.AVDISCARD_NONREF || s.hurry_up != 0) return 0;
// av_log(avctx, AV_LOG_ERROR, "no frame!\n");
//Console.WriteLine("!!!! NO FRAME !!!!");
//return s.get_consumed_bytes(buf_index, buf_size); //-1;
return -9;
}
if (0 == (s.flags2 & MpegEncContext.CODEC_FLAG2_CHUNKS)
|| (s.mb_y >= s.mb_height && s.mb_height != 0))
{
AVFrame @out = s.current_picture_ptr;
AVFrame cur = s.current_picture_ptr;
int i, pics, out_of_order, out_idx;
this.field_end();
if (cur.field_poc[0] == int.MaxValue
|| cur.field_poc[1] == int.MaxValue)
{
/* Wait for second field. */
data_size[0] = 0;
}
else
{
cur.interlaced_frame = 0;
cur.repeat_pict = 0;
/* Signal interlacing information externally. */
/*
* Prioritize picture timing SEI information over used decoding
* process if it exists.
*/
if (this.sps.pic_struct_present_flag != 0)
{
switch (this.sei_pic_struct)
{
case SEI_PIC_STRUCT_FRAME:
break;
case SEI_PIC_STRUCT_TOP_FIELD:
case SEI_PIC_STRUCT_BOTTOM_FIELD:
cur.interlaced_frame = 1;
break;
case SEI_PIC_STRUCT_TOP_BOTTOM:
case SEI_PIC_STRUCT_BOTTOM_TOP:
if ((mb_aff_frame != 0 || (s.picture_structure != Constants.PICT_FRAME)))
cur.interlaced_frame = 1;
else
// try to flag soft telecine progressive
cur.interlaced_frame = this.prev_interlaced_frame;
break;
case SEI_PIC_STRUCT_TOP_BOTTOM_TOP:
case SEI_PIC_STRUCT_BOTTOM_TOP_BOTTOM:
// Signal the possibility of telecined film externally
// (pic_struct 5,6)
// From these hints, let the applications decide if they
// apply deinterlacing.
cur.repeat_pict = 1;
break;
case SEI_PIC_STRUCT_FRAME_DOUBLING:
// Force progressive here, as doubling interlaced frame
// is a bad idea.
cur.repeat_pict = 2;
break;
case SEI_PIC_STRUCT_FRAME_TRIPLING:
cur.repeat_pict = 4;
break;
}
if ((this.sei_ct_type & 3) != 0
&& this.sei_pic_struct <= SEI_PIC_STRUCT_BOTTOM_TOP)
cur.interlaced_frame = ((this.sei_ct_type & (1 << 1)) != 0) ? 1
: 0;
}
else
{
/* Derive interlacing flag from used decoding process. */
cur.interlaced_frame = (mb_aff_frame != 0 || (s.picture_structure != Constants.PICT_FRAME)) ? 1
: 0;
}
this.prev_interlaced_frame = cur.interlaced_frame;
if (cur.field_poc[0] != cur.field_poc[1])
{
/* Derive top_field_first from field pocs. */
cur.top_field_first = (cur.field_poc[0] < cur.field_poc[1]) ? 1
: 0;
}
else
{
if (cur.interlaced_frame != 0
|| this.sps.pic_struct_present_flag != 0)
{
/*
* Use picture timing SEI information. Even if it is a
* information of a past frame, better than nothing.
*/
if (this.sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM
|| this.sei_pic_struct == SEI_PIC_STRUCT_TOP_BOTTOM_TOP)
cur.top_field_first = 1;
else
cur.top_field_first = 0;
}
else
{
/* Most likely progressive */
cur.top_field_first = 0;
}
}
// FIXME do something with unavailable reference frames
/* Sort B-frames into display order */
if (this.sps.bitstream_restriction_flag != 0
&& s.has_b_frames < this.sps.num_reorder_frames)
{
s.has_b_frames = this.sps.num_reorder_frames;
s.low_delay = 0;
}
if (s.strict_std_compliance >= MpegEncContext.FF_COMPLIANCE_STRICT
&& 0 == this.sps.bitstream_restriction_flag)
{
s.has_b_frames = MAX_DELAYED_PIC_COUNT;
s.low_delay = 0;
}
pics = 0;
while (this.delayed_pic[pics] != null)
pics++;
//assert(pics <= MAX_DELAYED_PIC_COUNT);
this.delayed_pic[pics++] = cur;
if (cur.reference == 0)
cur.reference = DELAYED_PIC_REF;
@out = this.delayed_pic[0];
out_idx = 0;
for (i = 1; this.delayed_pic[i] != null
&& 0 == this.delayed_pic[i].key_frame
&& 0 == this.delayed_pic[i].mmco_reset; i++)
if (this.delayed_pic[i].poc < @out.poc)
{
@out = this.delayed_pic[i];
out_idx = i;
}
if (s.has_b_frames == 0
&& (this.delayed_pic[0].key_frame != 0 || this.delayed_pic[0].mmco_reset != 0))
this.outputed_poc = int.MinValue;
out_of_order = (@out.poc < this.outputed_poc) ? 1 : 0;
if (this.sps.bitstream_restriction_flag != 0
&& s.has_b_frames >= this.sps.num_reorder_frames)
{
}
else if ((out_of_order != 0 && pics - 1 == s.has_b_frames && s.has_b_frames < MAX_DELAYED_PIC_COUNT)
|| (s.low_delay != 0 && ((this.outputed_poc != int.MinValue && @out.poc > this.outputed_poc + 2) || cur.pict_type == FF_B_TYPE)))
{
s.low_delay = 0;
s.has_b_frames++;
}
if (0 != out_of_order || pics > s.has_b_frames)
{
@out.reference &= ~DELAYED_PIC_REF;
for (i = out_idx; this.delayed_pic[i] != null; i++)
this.delayed_pic[i] = this.delayed_pic[i + 1];
}
if (0 == out_of_order && pics > s.has_b_frames)
{
data_size[0] = 1;
if (out_idx == 0
&& this.delayed_pic[0] != null
&& (this.delayed_pic[0].key_frame != 0 || this.delayed_pic[0].mmco_reset != 0))
{
this.outputed_poc = int.MinValue;
}
else
this.outputed_poc = @out.poc;
@out.copyTo(displayPicture);
// DebugTool.dumpFrameData(displayPicture);
}
else
{
// av_log(avctx, AV_LOG_DEBUG, "no picture\n");
}
}
}
// //assert(pict.data[0] || !*data_size);
// ff_print_debug_info(s, pict);
// printf("out %d\n", (int)pict.data[0]);
return s.get_consumed_bytes(buf_index, buf_size);
}
public int avcodec_decode_video2(AVFrame picture, int[] got_picture_ptr /* [0] = in/out param */, AVPacket avpkt)
{
int ret;
got_picture_ptr[0] = 0;
if ((this.coded_width != 0 || this.coded_height != 0) && av_image_check_size(this.coded_width, this.coded_height, 0, this) != 0)
{
return -7;
}
this.pkt = avpkt;
if ((this.codec.capabilities & H264Decoder.CODEC_CAP_DELAY) != 0 || avpkt.size != 0)
{
ret = this.codec.decode(this, picture, got_picture_ptr, avpkt);
// emms_c(); //needed to avoid an emms_c() call before every return;
picture.pkt_dts = avpkt.dts;
if (got_picture_ptr[0] != 0)
{
this.frame_number++;
}
}
else
{
ret = 0;
}
return ret;
}
public int decode(MpegEncContext s, AVFrame outdata, int[] outdata_size, AVPacket avpkt)
{
return s.priv_data.decode_frame(outdata, outdata_size, avpkt);
}
