FFmpeg: libavcodec/v210dec.c Source File

FFmpeg
v210dec.c
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1 /*
2  * V210 decoder
3  *
4  * Copyright (C) 2009 Michael Niedermayer <michaelni@gmx.at>
5  * Copyright (c) 2009 Baptiste Coudurier <baptiste dot coudurier at gmail dot com>
6  *
7  * This file is part of FFmpeg.
8  *
9  * FFmpeg is free software; you can redistribute it and/or
10  * modify it under the terms of the GNU Lesser General Public
11  * License as published by the Free Software Foundation; either
12  * version 2.1 of the License, or (at your option) any later version.
13  *
14  * FFmpeg is distributed in the hope that it will be useful,
15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  * Lesser General Public License for more details.
18  *
19  * You should have received a copy of the GNU Lesser General Public
20  * License along with FFmpeg; if not, write to the Free Software
21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
22  */
23 
24 #include "avcodec.h"
25 #include "codec_internal.h"
26 #include "v210dec.h"
27 #include "v210dec_init.h"
28 #include "libavutil/bswap.h"
29 #include "libavutil/imgutils.h"
30 #include "libavutil/internal.h"
31 #include "libavutil/intreadwrite.h"
32 #include "libavutil/mem.h"
33 #include "thread.h"
34 
35 typedef struct ThreadData {
36  AVFrame *frame;
37   const uint8_t *buf;
38   int stride;
39 } ThreadData;
40 
41  static av_cold int decode_init(AVCodecContext *avctx)
42 {
43  V210DecContext *s = avctx->priv_data;
44 
45  avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
46  avctx->bits_per_raw_sample = 10;
47 
48  s->thread_count = av_clip(avctx->thread_count, 1, avctx->height/4);
49  s->aligned_input = 0;
50  ff_v210dec_init(s);
51 
52  return 0;
53 }
54 
55  static void decode_row(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, const int width,
56  void (*unpack_frame)(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width))
57 {
58  uint32_t val;
59  int w = (FFMAX(0, width - 12) / 12) * 12;
60 
61  unpack_frame(src, y, u, v, w);
62 
63  y += w;
64  u += w >> 1;
65  v += w >> 1;
66  src += (w << 1) / 3;
67 
68  while (w < width - 5) {
69  READ_PIXELS(u, y, v);
70  READ_PIXELS(y, u, y);
71  READ_PIXELS(v, y, u);
72  READ_PIXELS(y, v, y);
73  w += 6;
74  }
75 
76  if (w++ < width) {
77  READ_PIXELS(u, y, v);
78 
79  if (w++ < width) {
80  val = av_le2ne32(*src++);
81  *y++ = val & 0x3FF;
82 
83  if (w++ < width) {
84  *u++ = (val >> 10) & 0x3FF;
85  *y++ = (val >> 20) & 0x3FF;
86  val = av_le2ne32(*src++);
87  *v++ = val & 0x3FF;
88 
89  if (w++ < width) {
90  *y++ = (val >> 10) & 0x3FF;
91 
92  if (w++ < width) {
93  *u++ = (val >> 20) & 0x3FF;
94  val = av_le2ne32(*src++);
95  *y++ = val & 0x3FF;
96  *v++ = (val >> 10) & 0x3FF;
97 
98  if (w++ < width)
99  *y++ = (val >> 20) & 0x3FF;
100  }
101  }
102  }
103  }
104  }
105 }
106 
107  static int v210_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
108 {
109  V210DecContext *s = avctx->priv_data;
110  ThreadData *td = arg;
111  AVFrame *frame = td->frame;
112  int stride = td->stride;
113  int slice_start = (avctx->height * jobnr) / s->thread_count;
114  int slice_end = (avctx->height * (jobnr+1)) / s->thread_count;
115  const uint8_t *psrc = td->buf + stride * slice_start;
116  int16_t *py = (uint16_t*)frame->data[0] + slice_start * frame->linesize[0] / 2;
117  int16_t *pu = (uint16_t*)frame->data[1] + slice_start * frame->linesize[1] / 2;
118  int16_t *pv = (uint16_t*)frame->data[2] + slice_start * frame->linesize[2] / 2;
119 
120  for (int h = slice_start; h < slice_end; h++) {
121  decode_row((const uint32_t *)psrc, py, pu, pv, avctx->width, s->unpack_frame);
122  psrc += stride;
123  py += frame->linesize[0] / 2;
124  pu += frame->linesize[1] / 2;
125  pv += frame->linesize[2] / 2;
126  }
127 
128  return 0;
129 }
130 
131  static int v210_stride(int width, int align) {
132  int aligned_width = ((width + align - 1) / align) * align;
133  return aligned_width * 8 / 3;
134 }
135 
136  static int decode_frame(AVCodecContext *avctx, AVFrame *pic,
137  int *got_frame, AVPacket *avpkt)
138 {
139  V210DecContext *s = avctx->priv_data;
140  ThreadData td;
141  int ret, stride, aligned_input;
142  const uint8_t *psrc = avpkt->data;
143 
144  if (s->custom_stride )
145  stride = s->custom_stride > 0 ? s->custom_stride : 0;
146  else {
147  stride = v210_stride(avctx->width, 48);
148  if (avpkt->size < stride * avctx->height) {
149  int align;
150  for (align = 24; align >= 6; align >>= 1) {
151  int small_stride = v210_stride(avctx->width, align);
152  if (avpkt->size == small_stride * avctx->height) {
153  stride = small_stride;
154  if (!s->stride_warning_shown)
155  av_log(avctx, AV_LOG_WARNING, "Broken v210 with too small padding (%d byte) detected\n", align * 8 / 3);
156  s->stride_warning_shown = 1;
157  break;
158  }
159  }
160  if (align < 6 && avctx->codec_tag == MKTAG('b', 'x', 'y', '2'))
161  stride = 0;
162  }
163  }
164 
165  if (stride == 0 && ((avctx->width & 1) || (int64_t)avctx->width * avctx->height > INT_MAX / 6)) {
166  av_log(avctx, AV_LOG_ERROR, "Strideless v210 is not supported for size %dx%d\n", avctx->width, avctx->height);
167  return AVERROR_INVALIDDATA;
168  }
169 
170  if (stride > 0 && avpkt->size < (int64_t)stride * avctx->height ||
171  stride == 0 && avpkt->size < v210_stride(avctx->width * avctx->height, 6)) {
172  av_log(avctx, AV_LOG_ERROR, "packet too small\n");
173  return AVERROR_INVALIDDATA;
174  }
175  if ( avctx->codec_tag == MKTAG('C', '2', '1', '0')
176  && avpkt->size > 64
177  && AV_RN32(psrc) == AV_RN32("INFO")
178  && avpkt->size - 64 >= stride * avctx->height)
179  psrc += 64;
180 
181  aligned_input = !((uintptr_t)psrc & 0x1f) && !(stride & 0x1f);
182  if (aligned_input != s->aligned_input) {
183  s->aligned_input = aligned_input;
184  ff_v210dec_init(s);
185  }
186 
187  if ((ret = ff_thread_get_buffer(avctx, pic, 0)) < 0)
188  return ret;
189 
190  if (stride) {
191  td.stride = stride;
192  td.buf = psrc;
193  td.frame = pic;
194  avctx->execute2(avctx, v210_decode_slice, &td, NULL, s->thread_count);
195  } else {
196  uint8_t *pointers[4];
197  int linesizes[4];
198  int ret = av_image_alloc(pointers, linesizes, avctx->width, avctx->height, avctx->pix_fmt, 1);
199  if (ret < 0)
200  return ret;
201  decode_row((const uint32_t *)psrc, (uint16_t *)pointers[0], (uint16_t *)pointers[1], (uint16_t *)pointers[2], avctx->width * avctx->height, s->unpack_frame);
202  av_image_copy2(pic->data, pic->linesize, pointers, linesizes,
203  avctx->pix_fmt, avctx->width, avctx->height);
204  av_freep(&pointers[0]);
205  }
206 
207  if (avctx->field_order > AV_FIELD_PROGRESSIVE) {
208  /* we have interlaced material flagged in container */
209  pic->flags |= AV_FRAME_FLAG_INTERLACED;
210  if (avctx->field_order == AV_FIELD_TT || avctx->field_order == AV_FIELD_TB)
211  pic->flags |= AV_FRAME_FLAG_TOP_FIELD_FIRST;
212  }
213 
214  *got_frame = 1;
215 
216  return avpkt->size;
217 }
218 
219  #define V210DEC_FLAGS AV_OPT_FLAG_DECODING_PARAM | AV_OPT_FLAG_VIDEO_PARAM
220  static const AVOption v210dec_options[] = {
221  {"custom_stride", "Custom V210 stride", offsetof(V210DecContext, custom_stride), AV_OPT_TYPE_INT,
222  {.i64 = 0}, -1, INT_MAX, V210DEC_FLAGS},
223  {NULL}
224 };
225 
226  static const AVClass v210dec_class = {
227  .class_name = "V210 Decoder",
228  .item_name = av_default_item_name,
229  .option = v210dec_options,
230  .version = LIBAVUTIL_VERSION_INT,
231 };
232 
233  const FFCodec ff_v210_decoder = {
234  .p.name = "v210",
235  CODEC_LONG_NAME("Uncompressed 4:2:2 10-bit"),
236  .p.type = AVMEDIA_TYPE_VIDEO,
237  .p.id = AV_CODEC_ID_V210,
238  .priv_data_size = sizeof(V210DecContext),
239  .init = decode_init,
240  FF_CODEC_DECODE_CB(decode_frame),
241  .p.capabilities = AV_CODEC_CAP_DR1 |
242  AV_CODEC_CAP_SLICE_THREADS |
243  AV_CODEC_CAP_FRAME_THREADS,
244  .p.priv_class = &v210dec_class,
245 };
v210dec_options
static const AVOption v210dec_options[]
Definition: v210dec.c:220
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:216
v210_stride
static int v210_stride(int width, int align)
Definition: v210dec.c:131
av_clip
#define av_clip
Definition: common.h:100
AV_FIELD_PROGRESSIVE
@ AV_FIELD_PROGRESSIVE
Definition: defs.h:213
int64_t
long long int64_t
Definition: coverity.c:34
decode_init
static av_cold int decode_init(AVCodecContext *avctx)
Definition: v210dec.c:41
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:427
ThreadData::stride
int stride
Definition: v210dec.c:38
w
uint8_t w
Definition: llviddspenc.c:38
u
#define u(width, name, range_min, range_max)
Definition: cbs_apv.c:68
AVPacket::data
uint8_t * data
Definition: packet.h:558
AVCodecContext::field_order
enum AVFieldOrder field_order
Field order.
Definition: avcodec.h:682
READ_PIXELS
#define READ_PIXELS(a, b, c)
Definition: v210dec_init.h:34
AVOption
AVOption.
Definition: opt.h:429
decode_frame
static int decode_frame(AVCodecContext *avctx, AVFrame *pic, int *got_frame, AVPacket *avpkt)
Definition: v210dec.c:136
FFCodec
Definition: codec_internal.h:127
ThreadData::frame
AVFrame * frame
Definition: dsddec.c:72
AVFrame::flags
int flags
Frame flags, a combination of AV_FRAME_FLAGS.
Definition: frame.h:671
FFMAX
#define FFMAX(a, b)
Definition: macros.h:47
v210dec_init.h
thread.h
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:448
AV_FRAME_FLAG_TOP_FIELD_FIRST
#define AV_FRAME_FLAG_TOP_FIELD_FIRST
A flag to mark frames where the top field is displayed first if the content is interlaced.
Definition: frame.h:655
AV_FIELD_TT
@ AV_FIELD_TT
Top coded_first, top displayed first.
Definition: defs.h:214
FFCodec::p
AVCodec p
The public AVCodec.
Definition: codec_internal.h:131
slice_end
static int slice_end(AVCodecContext *avctx, AVFrame *pict, int *got_output)
Handle slice ends.
Definition: mpeg12dec.c:1688
ThreadData::buf
const uint8_t * buf
Definition: v210dec.c:37
AVCodecContext::thread_count
int thread_count
thread count is used to decide how many independent tasks should be passed to execute()
Definition: avcodec.h:1561
unpack_frame
static void unpack_frame(EVRCContext *e)
Frame unpacking for RATE_FULL, RATE_HALF and RATE_QUANT.
Definition: evrcdec.c:110
val
static double val(void *priv, double ch)
Definition: aeval.c:77
AV_FIELD_TB
@ AV_FIELD_TB
Top coded first, bottom displayed first.
Definition: defs.h:216
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:210
av_cold
#define av_cold
Definition: attributes.h:106
FF_CODEC_DECODE_CB
#define FF_CODEC_DECODE_CB(func)
Definition: codec_internal.h:346
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:198
ff_v210dec_init
static av_unused av_cold void ff_v210dec_init(V210DecContext *s)
Definition: v210dec_init.h:54
ff_thread_get_buffer
int ff_thread_get_buffer(AVCodecContext *avctx, AVFrame *f, int flags)
Wrapper around get_buffer() for frame-multithreaded codecs.
Definition: pthread_frame.c:1037
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:1553
pointers
Undefined Behavior In the C some operations are like signed integer dereferencing freed pointers
Definition: undefined.txt:4
CODEC_LONG_NAME
#define CODEC_LONG_NAME(str)
Definition: codec_internal.h:331
V210DecContext
Definition: v210dec.h:26
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:95
LIBAVUTIL_VERSION_INT
#define LIBAVUTIL_VERSION_INT
Definition: version.h:85
AVClass
Describe the class of an AVClass context structure.
Definition: log.h:76
NULL
#define NULL
Definition: coverity.c:32
av_default_item_name
const char * av_default_item_name(void *ptr)
Return the context name.
Definition: log.c:241
AV_RN32
#define AV_RN32(p)
Definition: intreadwrite.h:360
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:540
av_image_alloc
int av_image_alloc(uint8_t *pointers[4], int linesizes[4], int w, int h, enum AVPixelFormat pix_fmt, int align)
Allocate an image with size w and h and pixel format pix_fmt, and fill pointers and linesizes accordi...
Definition: imgutils.c:218
init
int(* init)(AVBSFContext *ctx)
Definition: dts2pts.c:368
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:559
codec_internal.h
AV_CODEC_ID_V210
@ AV_CODEC_ID_V210
Definition: codec_id.h:179
align
static const uint8_t *BS_FUNC() align(BSCTX *bc)
Skip bits to a byte boundary.
Definition: bitstream_template.h:419
AV_CODEC_CAP_SLICE_THREADS
#define AV_CODEC_CAP_SLICE_THREADS
Codec supports slice-based (or partition-based) multithreading.
Definition: codec.h:99
ff_v210_decoder
const FFCodec ff_v210_decoder
Definition: v210dec.c:233
v210dec_class
static const AVClass v210dec_class
Definition: v210dec.c:226
internal.h
ThreadData
Used for passing data between threads.
Definition: dsddec.c:71
av_le2ne32
#define av_le2ne32(x)
Definition: bswap.h:92
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:179
AVCodecContext::height
int height
Definition: avcodec.h:592
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:631
AV_FRAME_FLAG_INTERLACED
#define AV_FRAME_FLAG_INTERLACED
A flag to mark frames whose content is interlaced.
Definition: frame.h:650
avcodec.h
slice_start
static int slice_start(SliceContext *sc, VVCContext *s, VVCFrameContext *fc, const CodedBitstreamUnit *unit, const int is_first_slice)
Definition: dec.c:845
stride
#define stride
Definition: h264pred_template.c:536
ret
ret
Definition: filter_design.txt:187
bswap.h
AVClass::class_name
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
Definition: log.h:81
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:265
AVCodecContext
main external API structure.
Definition: avcodec.h:431
decode_row
static void decode_row(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, const int width, void(*unpack_frame)(const uint32_t *src, uint16_t *y, uint16_t *u, uint16_t *v, int width))
Definition: v210dec.c:55
V210DEC_FLAGS
#define V210DEC_FLAGS
Definition: v210dec.c:219
av_image_copy2
static void av_image_copy2(uint8_t *const dst_data[4], const int dst_linesizes[4], uint8_t *const src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Wrapper around av_image_copy() to workaround the limitation that the conversion from uint8_t * const ...
Definition: imgutils.h:184
AV_OPT_TYPE_INT
@ AV_OPT_TYPE_INT
Underlying C type is int.
Definition: opt.h:259
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:200
mem.h
AVCodecContext::codec_tag
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:456
AVPacket
This structure stores compressed data.
Definition: packet.h:535
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:458
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
v210_decode_slice
static int v210_decode_slice(AVCodecContext *avctx, void *arg, int jobnr, int threadnr)
Definition: v210dec.c:107
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:592
imgutils.h
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, a positive or negative value, which is typically indicating the size in bytes of each pict...
Definition: frame.h:472
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:27
AVERROR_INVALIDDATA
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
Definition: error.h:61
MKTAG
#define MKTAG(a, b, c, d)
Definition: macros.h:55
h
h
Definition: vp9dsp_template.c:2070
width
#define width
Definition: dsp.h:89
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:1610
src
#define src
Definition: vp8dsp.c:248
v210dec.h
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