FFmpeg
v410dec.c
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1 /*
2  * v410 decoder
3  *
4  * Copyright (c) 2011 Derek Buitenhuis
5  *
6  * This file is part of FFmpeg.
7  *
8  * FFmpeg is free software; you can redistribute it and/or
9  * modify it under the terms of the GNU Lesser General Public
10  * License as published by the Free Software Foundation; either
11  * version 2.1 of the License, or (at your option) any later version.
12  *
13  * FFmpeg is distributed in the hope that it will be useful,
14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16  * Lesser General Public License for more details.
17  *
18  * You should have received a copy of the GNU Lesser General Public
19  * License along with FFmpeg; if not, write to the Free Software
20  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
21  */
22 
23 #include "libavutil/common.h"
24 #include "libavutil/intreadwrite.h"
25 #include "avcodec.h"
26 #include "internal.h"
27 #include "thread.h"
28 
29 typedef struct ThreadData {
30  AVFrame *frame;
31  uint8_t *buf;
32  int stride;
33 } ThreadData;
34 
36 {
38  avctx->bits_per_raw_sample = 10;
39 
40  if (avctx->width & 1) {
41  if (avctx->err_recognition & AV_EF_EXPLODE) {
42  av_log(avctx, AV_LOG_ERROR, "v410 requires width to be even.\n");
43  return AVERROR_INVALIDDATA;
44  } else {
45  av_log(avctx, AV_LOG_WARNING, "v410 requires width to be even, continuing anyway.\n");
46  }
47  }
48 
49  return 0;
50 }
51 
52 static int v410_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
53 {
54  ThreadData *td = arg;
55  AVFrame *pic = td->frame;
56  int stride = td->stride;
57  int thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
58  int slice_start = (avctx->height * jobnr) / thread_count;
59  int slice_end = (avctx->height * (jobnr+1)) / thread_count;
60  const uint8_t *src = td->buf + stride * slice_start;
61  uint16_t *y, *u, *v;
62  uint32_t val;
63  int i, j;
64 
65  y = (uint16_t*)pic->data[0] + slice_start * (pic->linesize[0] >> 1);
66  u = (uint16_t*)pic->data[1] + slice_start * (pic->linesize[1] >> 1);
67  v = (uint16_t*)pic->data[2] + slice_start * (pic->linesize[2] >> 1);
68 
69  for (i = slice_start; i < slice_end; i++) {
70  for (j = 0; j < avctx->width; j++) {
71  val = AV_RL32(src);
72 
73  u[j] = (val >> 2) & 0x3FF;
74  y[j] = (val >> 12) & 0x3FF;
75  v[j] = (val >> 22);
76 
77  src += 4;
78  }
79 
80  y += pic->linesize[0] >> 1;
81  u += pic->linesize[1] >> 1;
82  v += pic->linesize[2] >> 1;
83  }
84 
85  return 0;
86 }
87 
88 static int v410_decode_frame(AVCodecContext *avctx, void *data,
89  int *got_frame, AVPacket *avpkt)
90 {
91  ThreadData td;
92  ThreadFrame frame = { .f = data };
93  AVFrame *pic = data;
94  uint8_t *src = avpkt->data;
95  int ret;
96  int thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
97 
98  td.stride = avctx->width * 4;
99  if (avpkt->size < 4 * avctx->height * avctx->width) {
100  av_log(avctx, AV_LOG_ERROR, "Insufficient input data.\n");
101  return AVERROR(EINVAL);
102  }
103 
104  if ((ret = ff_thread_get_buffer(avctx, &frame, 0)) < 0)
105  return ret;
106 
107  pic->key_frame = 1;
109 
110  td.buf = src;
111  td.frame = pic;
112  avctx->execute2(avctx, v410_decode_slice, &td, NULL, thread_count);
113 
114  *got_frame = 1;
115 
116  return avpkt->size;
117 }
118 
120  .name = "v410",
121  .long_name = NULL_IF_CONFIG_SMALL("Uncompressed 4:4:4 10-bit"),
122  .type = AVMEDIA_TYPE_VIDEO,
123  .id = AV_CODEC_ID_V410,
124  .init = v410_decode_init,
125  .decode = v410_decode_frame,
126  .capabilities = AV_CODEC_CAP_DR1 | AV_CODEC_CAP_SLICE_THREADS |
128  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
129 };
AVCodec
AVCodec.
Definition: codec.h:202
stride
int stride
Definition: mace.c:144
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:186
FF_CODEC_CAP_INIT_THREADSAFE
#define FF_CODEC_CAP_INIT_THREADSAFE
The codec does not modify any global variables in the init function, allowing to call the init functi...
Definition: internal.h:42
td
#define td
Definition: regdef.h:70
av_clip
#define av_clip
Definition: common.h:96
AVERROR
Filter the word “frame” indicates either a video frame or a group of audio as stored in an AVFrame structure Format for each input and each output the list of supported formats For video that means pixel format For audio that means channel sample they are references to shared objects When the negotiation mechanism computes the intersection of the formats supported at each end of a all references to both lists are replaced with a reference to the intersection And when a single format is eventually chosen for a link amongst the remaining all references to the list are updated That means that if a filter requires that its input and output have the same format amongst a supported all it has to do is use a reference to the same list of formats query_formats can leave some formats unset and return AVERROR(EAGAIN) to cause the negotiation mechanism toagain later. That can be used by filters with complex requirements to use the format negotiated on one link to set the formats supported on another. Frame references ownership and permissions
u
#define u(width, name, range_min, range_max)
Definition: cbs_h2645.c:264
AVCodecContext::err_recognition
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
Definition: avcodec.h:1324
v410_decode_init
static av_cold int v410_decode_init(AVCodecContext *avctx)
Definition: v410dec.c:35
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:303
ThreadData::stride
int stride
Definition: v210dec.c:43
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:373
data
const char data[16]
Definition: mxf.c:143
ThreadData::frame
AVFrame * frame
Definition: dsddec.c:68
thread.h
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:317
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1440
ff_thread_get_buffer
the pkt_dts and pkt_pts fields in AVFrame will work as usual Restrictions on codec whose streams don t reset across will not work because their bitstreams cannot be decoded in parallel *The contents of buffers must not be read before as well as code calling up to before the decode process starts Call have so the codec calls ff_thread_report set FF_CODEC_CAP_ALLOCATE_PROGRESS in AVCodec caps_internal and use ff_thread_get_buffer() to allocate frames. The frames must then be freed with ff_thread_release_buffer(). Otherwise decode directly into the user-supplied frames. Call ff_thread_report_progress() after some part of the current picture has decoded. A good place to put this is where draw_horiz_band() is called - add this if it isn 't called anywhere
AVFrame::key_frame
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:381
val
static double val(void *priv, double ch)
Definition: aeval.c:76
ff_v410_decoder
const AVCodec ff_v410_decoder
Definition: v410dec.c:119
AV_PIX_FMT_YUV444P10
#define AV_PIX_FMT_YUV444P10
Definition: pixfmt.h:394
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:180
av_cold
#define av_cold
Definition: attributes.h:90
v410_decode_slice
static int v410_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
Definition: v410dec.c:52
intreadwrite.h
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict)
Handle slice ends.
Definition: mpeg12dec.c:2041
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1425
arg
const char * arg
Definition: jacosubdec.c:67
AV_CODEC_CAP_FRAME_THREADS
#define AV_CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
Definition: codec.h:113
NULL
#define NULL
Definition: coverity.c:32
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
src
#define src
Definition: vp8dsp.c:255
AV_EF_EXPLODE
#define AV_EF_EXPLODE
abort decoding on minor error detection
Definition: avcodec.h:1335
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:386
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() or get_encode_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:52
AVPacket::size
int size
Definition: packet.h:374
NULL_IF_CONFIG_SMALL
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
Definition: internal.h:117
AV_CODEC_CAP_SLICE_THREADS
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:117
v410_decode_frame
static int v410_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: v410dec.c:88
ThreadData::buf
uint8_t * buf
Definition: v210dec.c:42
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:271
common.h
ThreadData
Used for passing data between threads.
Definition: dsddec.c:67
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:209
AVCodecContext::height
int height
Definition: avcodec.h:556
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:593
avcodec.h
ret
ret
Definition: filter_design.txt:187
frame
these buffered frames must be flushed immediately if a new input produces new the filter must not call request_frame to get more It must just process the frame or queue it The task of requesting more frames is left to the filter s request_frame method or the application If a filter has several the filter must be ready for frames arriving randomly on any input any filter with several inputs will most likely require some kind of queuing mechanism It is perfectly acceptable to have a limited queue and to drop frames when the inputs are too unbalanced request_frame For filters that do not use the this method is called when a frame is wanted on an output For a it should directly call filter_frame on the corresponding output For a if there are queued frames already one of these frames should be pushed If the filter should request a frame on one of its repeatedly until at least one frame has been pushed Return or at least make progress towards producing a frame
Definition: filter_design.txt:264
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:92
AVCodecContext
main external API structure.
Definition: avcodec.h:383
ThreadFrame
Definition: thread.h:34
AV_CODEC_ID_V410
@ AV_CODEC_ID_V410
Definition: codec_id.h:207
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
AVPacket
This structure stores compressed data.
Definition: packet.h:350
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:556
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:334
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
AVCodecContext::execute2
int(* execute2)(struct AVCodecContext *c, int(*func)(struct AVCodecContext *c2, void *arg, int jobnr, int threadnr), void *arg2, int *ret, int count)
The codec may call this to execute several independent things.
Definition: avcodec.h:1511