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Merge commit '9c09fbd8053292267cdc4b542913ceced43ea3a9' 

* commit '9c09fbd8053292267cdc4b542913ceced43ea3a9':
  rtpdec: experimental VP9 depacketizer (draft 0)

Conflicts:
	libavformat/rtpdec.c
	libavformat/rtpdec_vp9.c
	libavformat/version.h

See: e4a6486c17
See: f966ac2b6e
See: 629a03a912
Merged-by: Michael Niedermayer <michaelni@gmx.at>
tags/n2.6
Michael Niedermayer 11 years ago
parent
dcf7924f4d 9c09fbd805
commit
63ea3a86b7
3 changed files with 93 additions and 97 deletions
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  1. +1
    -0
      Changelog
  2. +91
    -96
      libavformat/rtpdec_vp9.c
  3. +1
    -1
      libavformat/version.h

+ 1
- 0
Changelog View File

@@ -35,6 +35,7 @@ version <next>:
- Fix stsd atom corruption in DNxHD QuickTimes
- Canopus HQX decoder
- RTP depacketization of T.140 text (RFC 4103)
- VP9 RTP payload format (draft 0) experimental depacketizer


version 2.5:


+ 91
- 96
libavformat/rtpdec_vp9.c View File

@@ -17,10 +17,9 @@
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
*/

#include "libavcodec/bytestream.h"
#include "libavutil/intreadwrite.h"

#include "avio_internal.h"
#include "rtpdec_formats.h"
@@ -33,17 +32,11 @@ struct PayloadContext {
};

static av_cold int vp9_init(AVFormatContext *ctx, int st_index,
PayloadContext *data)
PayloadContext *data)
{
av_dlog(ctx, "vp9_init() for stream %d\n", st_index);
av_log(ctx, AV_LOG_WARNING,
"RTP/VP9 support is still experimental\n");

if (st_index < 0)
return 0;

ctx->streams[st_index]->need_parsing = AVSTREAM_PARSE_FULL;

return 0;
}

@@ -57,12 +50,12 @@ static int vp9_handle_packet(AVFormatContext *ctx, PayloadContext *rtp_vp9_ctx,
av_unused int layer_temporal = -1, layer_spatial = -1, layer_quality = -1;
int ref_fields = 0, has_ref_field_ext_pic_id = 0;
int first_fragment, last_fragment;
int rtp_m;
int res = 0;

/* drop data of previous packets in case of non-continuous (lossy) packet stream */
if (rtp_vp9_ctx->buf && rtp_vp9_ctx->timestamp != *timestamp) {
if (rtp_vp9_ctx->buf && rtp_vp9_ctx->timestamp != *timestamp)
ffio_free_dyn_buf(&rtp_vp9_ctx->buf);
}

/* sanity check for size of input packet: 1 byte payload at least */
if (len < RTP_VP9_DESC_REQUIRED_SIZE + 1) {
@@ -71,32 +64,34 @@ static int vp9_handle_packet(AVFormatContext *ctx, PayloadContext *rtp_vp9_ctx,
}

/*
decode the required VP9 payload descriptor according to section 4.2 of the spec.:

0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
|I|L|F|B|E|V|U|-| (REQUIRED)
+-+-+-+-+-+-+-+-+

I: PictureID present
L: Layer indices present
F: Reference indices present
B: Start of VP9 frame
E: End of picture
V: Scalability Structure (SS) present
U: Scalability Structure Update (SU) present
*/
has_pic_id = buf[0] & 0x80;
has_layer_idc = buf[0] & 0x40;
has_ref_idc = buf[0] & 0x20;
first_fragment = buf[0] & 0x10;
last_fragment = buf[0] & 0x08;
has_ss_data = buf[0] & 0x04;
has_su_data = buf[0] & 0x02;
* decode the required VP9 payload descriptor according to section 4.2 of the spec.:
*
* 0 1 2 3 4 5 6 7
* +-+-+-+-+-+-+-+-+
* |I|L|F|B|E|V|U|-| (REQUIRED)
* +-+-+-+-+-+-+-+-+
*
* I: PictureID present
* L: Layer indices present
* F: Reference indices present
* B: Start of VP9 frame
* E: End of picture
* V: Scalability Structure (SS) present
* U: Scalability Structure Update (SU) present
*/
has_pic_id = !!(buf[0] & 0x80);
has_layer_idc = !!(buf[0] & 0x40);
has_ref_idc = !!(buf[0] & 0x20);
first_fragment = !!(buf[0] & 0x10);
last_fragment = !!(buf[0] & 0x08);
has_ss_data = !!(buf[0] & 0x04);
has_su_data = !!(buf[0] & 0x02);

rtp_m = !!(flags & RTP_FLAG_MARKER);

/* sanity check for markers: B should always be equal to the RTP M marker */
if (last_fragment >> 2 != flags & RTP_FLAG_MARKER) {
av_log(ctx, AV_LOG_ERROR, "Invalid combination of B and M marker\n");
if (last_fragment != rtp_m) {
av_log(ctx, AV_LOG_ERROR, "Invalid combination of B and M marker (%d != %d)\n", last_fragment, rtp_m);
return AVERROR_INVALIDDATA;
}

@@ -105,17 +100,17 @@ static int vp9_handle_packet(AVFormatContext *ctx, PayloadContext *rtp_vp9_ctx,
len -= RTP_VP9_DESC_REQUIRED_SIZE;

/*
decode the 1-byte/2-byte picture ID:
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
I: |M|PICTURE ID | (RECOMMENDED)
+-+-+-+-+-+-+-+-+
M: | EXTENDED PID | (RECOMMENDED)
+-+-+-+-+-+-+-+-+
M: The most significant bit of the first octet is an extension flag.
PictureID: 8 or 16 bits including the M bit.
* decode the 1-byte/2-byte picture ID:
*
* 0 1 2 3 4 5 6 7
* +-+-+-+-+-+-+-+-+
* I: |M|PICTURE ID | (RECOMMENDED)
* +-+-+-+-+-+-+-+-+
* M: | EXTENDED PID | (RECOMMENDED)
* +-+-+-+-+-+-+-+-+
*
* M: The most significant bit of the first octet is an extension flag.
* PictureID: 8 or 16 bits including the M bit.
*/
if (has_pic_id) {
if (len < 1) {
@@ -140,20 +135,20 @@ static int vp9_handle_packet(AVFormatContext *ctx, PayloadContext *rtp_vp9_ctx,
}

/*
decode layer indices
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
L: | T | S | Q | R | (CONDITIONALLY RECOMMENDED)
+-+-+-+-+-+-+-+-+
T, S and Q are 2-bit indices for temporal, spatial, and quality layers.
If "F" is set in the initial octet, R is 2 bits representing the number
of reference fields this frame refers to.
* decode layer indices
*
* 0 1 2 3 4 5 6 7
* +-+-+-+-+-+-+-+-+
* L: | T | S | Q | R | (CONDITIONALLY RECOMMENDED)
* +-+-+-+-+-+-+-+-+
*
* T, S and Q are 2-bit indices for temporal, spatial, and quality layers.
* If "F" is set in the initial octet, R is 2 bits representing the number
* of reference fields this frame refers to.
*/
if (has_layer_idc) {
if (len < 1) {
av_log(ctx, AV_LOG_ERROR, "Too short RTP/VP9 packet");
av_log(ctx, AV_LOG_ERROR, "Too short RTP/VP9 packet\n");
return AVERROR_INVALIDDATA;
}
layer_temporal = buf[0] & 0xC0;
@@ -169,18 +164,18 @@ static int vp9_handle_packet(AVFormatContext *ctx, PayloadContext *rtp_vp9_ctx,
}

/*
decode the reference fields
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+ -\
F: | PID |X| RS| RQ| (OPTIONAL) .
+-+-+-+-+-+-+-+-+ . - R times
X: | EXTENDED PID | (OPTIONAL) .
+-+-+-+-+-+-+-+-+ -/
PID: The relative Picture ID referred to by this frame.
RS and RQ: The spatial and quality layer IDs.
X: 1 if this layer index has an extended relative Picture ID.
* decode the reference fields
*
* 0 1 2 3 4 5 6 7
* +-+-+-+-+-+-+-+-+ -\
* F: | PID |X| RS| RQ| (OPTIONAL) .
* +-+-+-+-+-+-+-+-+ . - R times
* X: | EXTENDED PID | (OPTIONAL) .
* +-+-+-+-+-+-+-+-+ -/
*
* PID: The relative Picture ID referred to by this frame.
* RS and RQ: The spatial and quality layer IDs.
* X: 1 if this layer index has an extended relative Picture ID.
*/
if (has_ref_idc) {
while (ref_fields) {
@@ -214,42 +209,42 @@ static int vp9_handle_packet(AVFormatContext *ctx, PayloadContext *rtp_vp9_ctx,
}

/*
decode the scalability structure (SS)
0 1 2 3 4 5 6 7
+-+-+-+-+-+-+-+-+
V: | PATTERN LENGTH|
+-+-+-+-+-+-+-+-+ -\
| T | S | Q | R | (OPTIONAL) .
+-+-+-+-+-+-+-+-+ -\ .
| PID |X| RS| RQ| (OPTIONAL) . . - PAT. LEN. times
+-+-+-+-+-+-+-+-+ . - R times .
X: | EXTENDED PID | (OPTIONAL) . .
+-+-+-+-+-+-+-+-+ -/ -/
PID: The relative Picture ID referred to by this frame.
RS and RQ: The spatial and quality layer IDs.
X: 1 if this layer index has an extended relative Picture ID.
* decode the scalability structure (SS)
*
* 0 1 2 3 4 5 6 7
* +-+-+-+-+-+-+-+-+
* V: | PATTERN LENGTH|
* +-+-+-+-+-+-+-+-+ -\
* | T | S | Q | R | (OPTIONAL) .
* +-+-+-+-+-+-+-+-+ -\ .
* | PID |X| RS| RQ| (OPTIONAL) . . - PAT. LEN. times
* +-+-+-+-+-+-+-+-+ . - R times .
* X: | EXTENDED PID | (OPTIONAL) . .
* +-+-+-+-+-+-+-+-+ -/ -/
*
* PID: The relative Picture ID referred to by this frame.
* RS and RQ: The spatial and quality layer IDs.
* X: 1 if this layer index has an extended relative Picture ID.
*/
if (has_ss_data) {
avpriv_report_missing_feature(ctx, "VP9 scalability structure data\n");
return AVERROR_PATCHWELCOME;
avpriv_report_missing_feature(ctx, "VP9 scalability structure data");
return AVERROR(ENOSYS);
}

/*
decode the scalability update structure (SU)
spec. is tbd
* decode the scalability update structure (SU)
*
* spec. is tbd
*/
if (has_su_data) {
avpriv_report_missing_feature(ctx, "VP9 scalability update structure data\n");
return AVERROR_PATCHWELCOME;
avpriv_report_missing_feature(ctx, "VP9 scalability update structure data");
return AVERROR(ENOSYS);
}

/*
decode the VP9 payload header
spec. is tbd
* decode the VP9 payload header
*
* spec. is tbd
*/
//XXX: implement when specified

@@ -293,7 +288,7 @@ RTPDynamicProtocolHandler ff_vp9_dynamic_handler = {
.enc_name = "VP9",
.codec_type = AVMEDIA_TYPE_VIDEO,
.codec_id = AV_CODEC_ID_VP9,
.init = vp9_init,
.priv_data_size = sizeof(PayloadContext),
.init = vp9_init,
.parse_packet = vp9_handle_packet
};

+ 1
- 1
libavformat/version.h View File

@@ -31,7 +31,7 @@

#define LIBAVFORMAT_VERSION_MAJOR 56
#define LIBAVFORMAT_VERSION_MINOR 25
#define LIBAVFORMAT_VERSION_MICRO 100
#define LIBAVFORMAT_VERSION_MICRO 101

#define LIBAVFORMAT_VERSION_INT AV_VERSION_INT(LIBAVFORMAT_VERSION_MAJOR, \
LIBAVFORMAT_VERSION_MINOR, \


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