FFmpeg: libavcodec/libutvideodec.cpp Source File

FFmpeg
libutvideodec.cpp
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1 /*
2  * Copyright (c) 2011 Derek Buitenhuis
3  *
4  * This file is part of FFmpeg.
5  *
6  * FFmpeg is free software; you can redistribute it and/or
7  * modify it under the terms of the GNU General Public
8  * License as published by the Free Software Foundation;
9  * version 2 of the License.
10  *
11  * FFmpeg is distributed in the hope that it will be useful,
12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14  * General Public License for more details.
15  *
16  * You should have received a copy of the GNU General Public
17  * License along with FFmpeg; if not, write to the Free Software
18  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19  */
20 
21 /**
22  * @file
23  * Known FOURCCs:
24  * 'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA),
25  * 'ULH0' (YCbCr 4:2:0 BT.709), 'ULH2' (YCbCr 4:2:2 BT.709)
26  */
27 
28 extern "C" {
29 #include "avcodec.h"
30 #include "libavutil/imgutils.h"
31 }
32 
33 #include "libutvideo.h"
34 #include "get_bits.h"
35 
36  static av_cold int utvideo_decode_init(AVCodecContext *avctx)
37 {
38  UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
39  UtVideoExtra info;
40  int format;
41  int begin_ret;
42 
43  if (avctx->extradata_size != 16 && avctx->extradata_size != 8 ) {
44  av_log(avctx, AV_LOG_ERROR, "Extradata size (%d) mismatch.\n", avctx->extradata_size);
45  return -1;
46  }
47 
48  /* Read extradata */
49  info.version = AV_RL32(avctx->extradata);
50  info.original_format = AV_RL32(avctx->extradata + 4);
51  info.frameinfo_size = AV_RL32(avctx->extradata + 8);
52  info.flags = AV_RL32(avctx->extradata + 12);
53 
54  /* Pick format based on FOURCC */
55  switch (avctx->codec_tag) {
56 #ifdef UTV_BT709
57  case MKTAG('U', 'L', 'H', '0'):
58  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
59  avctx->colorspace = AVCOL_SPC_BT709;
60  format = UTVF_YV12;
61  break;
62  case MKTAG('U', 'L', 'H', '2'):
63  avctx->pix_fmt = AV_PIX_FMT_YUYV422;
64  avctx->colorspace = AVCOL_SPC_BT709;
65  format = UTVF_YUY2;
66  break;
67 #endif
68  case MKTAG('U', 'L', 'Y', '0'):
69  avctx->pix_fmt = AV_PIX_FMT_YUV420P;
70  format = UTVF_YV12;
71  break;
72  case MKTAG('U', 'L', 'Y', '2'):
73  avctx->pix_fmt = AV_PIX_FMT_YUYV422;
74  format = UTVF_YUY2;
75  break;
76  case MKTAG('U', 'L', 'R', 'G'):
77  avctx->pix_fmt = AV_PIX_FMT_BGR24;
78  format = UTVF_NFCC_BGR_BU;
79  break;
80  case MKTAG('U', 'L', 'R', 'A'):
81  avctx->pix_fmt = AV_PIX_FMT_RGB32;
82  format = UTVF_NFCC_BGRA_BU;
83  break;
84 #ifdef UTVF_UQY2
85  case MKTAG('U', 'Q', 'Y', '2'):
86  avctx->pix_fmt = AV_PIX_FMT_YUV422P10;
87  format = UTVF_v210;
88  break;
89 #endif
90  default:
91  av_log(avctx, AV_LOG_ERROR,
92  "Not a Ut Video FOURCC: %X\n", avctx->codec_tag);
93  return -1;
94  }
95 
96  /* Only allocate the buffer once */
97  utv->buf_size = av_image_get_buffer_size(avctx->pix_fmt, avctx->width, avctx->height, 1);
98 #ifdef UTVF_UQY2
99  if (format == UTVF_v210)
100  utv->buf_size += avctx->height * ((avctx->width + 47) / 48) * 128; // the linesize used by the decoder, this does not seem to be exported
101 #endif
102  utv->buffer = (uint8_t *)av_malloc(utv->buf_size * sizeof(uint8_t));
103 
104  if (utv->buffer == NULL) {
105  av_log(avctx, AV_LOG_ERROR, "Unable to allocate output buffer.\n");
106  return -1;
107  }
108 
109  /* Allocate the output frame */
110  avctx->coded_frame = av_frame_alloc();
111 
112  /* Ut Video only supports 8-bit */
113  avctx->bits_per_raw_sample = 8;
114 
115  /* Is it interlaced? */
116  avctx->coded_frame->interlaced_frame = info.flags & 0x800 ? 1 : 0;
117 
118  /* Apparently Ut Video doesn't store this info... */
119  avctx->coded_frame->top_field_first = 1;
120 
121  /*
122  * Create a Ut Video instance. Since the function wants
123  * an "interface name" string, pass it the name of the lib.
124  */
125  utv->codec = CCodec::CreateInstance(UNFCC(avctx->codec_tag), "libavcodec");
126 
127  /* Initialize Decoding */
128  begin_ret = utv->codec->DecodeBegin(format, avctx->width, avctx->height,
129  CBGROSSWIDTH_WINDOWS, &info, sizeof(UtVideoExtra));
130 
131  /* Check to see if the decoder initlized properly */
132  if (begin_ret != 0) {
133  av_log(avctx, AV_LOG_ERROR,
134  "Could not initialize decoder: %d\n", begin_ret);
135  return -1;
136  }
137 
138  return 0;
139 }
140 
141  static int utvideo_decode_frame(AVCodecContext *avctx, void *data,
142  int *got_frame, AVPacket *avpkt)
143 {
144  UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
145  AVFrame *pic = avctx->coded_frame;
146  int w = avctx->width, h = avctx->height;
147 
148  /* Set flags */
149  pic->pict_type = AV_PICTURE_TYPE_I;
150  pic->key_frame = 1;
151 
152  /* Decode the frame */
153  utv->codec->DecodeFrame(utv->buffer, avpkt->data, true);
154 
155  /* Set the output data depending on the colorspace */
156  switch (avctx->pix_fmt) {
157  case AV_PIX_FMT_YUV420P:
158  pic->linesize[0] = w;
159  pic->linesize[1] = pic->linesize[2] = w / 2;
160  pic->data[0] = utv->buffer;
161  pic->data[2] = utv->buffer + (w * h);
162  pic->data[1] = pic->data[2] + (w * h / 4);
163  break;
164  case AV_PIX_FMT_YUYV422:
165  pic->linesize[0] = w * 2;
166  pic->data[0] = utv->buffer;
167  break;
168  case AV_PIX_FMT_YUV422P10: {
169  uint16_t *y, *u, *v;
170  int i,j;
171  int linesize = ((w + 47) / 48) * 128;
172 
173  pic->linesize[0] = w * 2;
174  pic->linesize[1] =
175  pic->linesize[2] = w;
176  pic->data[0] = utv->buffer + linesize * h;
177  pic->data[1] = pic->data[0] + h*pic->linesize[0];
178  pic->data[2] = pic->data[1] + h*pic->linesize[1];
179  y = (uint16_t*)pic->data[0];
180  u = (uint16_t*)pic->data[1];
181  v = (uint16_t*)pic->data[2];
182  for (j = 0; j < h; j++) {
183  const uint8_t *in = utv->buffer + j * linesize;
184 
185  for (i = 0; i + 1 < w; i += 6, in += 4) {
186  unsigned a,b;
187  a = AV_RL32(in);
188  in += 4;
189  b = AV_RL32(in);
190  *u++ = (a ) & 0x3FF;
191  *y++ = (a>>10) & 0x3FF;
192  *v++ = (a>>20) & 0x3FF;
193  *y++ = (b ) & 0x3FF;
194 
195  if (i + 3 >= w)
196  break;
197 
198  in += 4;
199  a = AV_RL32(in);
200  *u++ = (b>>10) & 0x3FF;
201  *y++ = (b>>20) & 0x3FF;
202  *v++ = (a ) & 0x3FF;
203  *y++ = (a>>10) & 0x3FF;
204 
205  if (i + 5 >= w)
206  break;
207 
208  in += 4;
209  b = AV_RL32(in);
210  *u++ = (a>>20) & 0x3FF;
211  *y++ = (b ) & 0x3FF;
212  *v++ = (b>>10) & 0x3FF;
213  *y++ = (b>>20) & 0x3FF;
214  }
215  }
216  break;
217  }
218  case AV_PIX_FMT_BGR24:
219  case AV_PIX_FMT_RGB32:
220  /* Make the linesize negative, since Ut Video uses bottom-up BGR */
221  pic->linesize[0] = -1 * w * (avctx->pix_fmt == AV_PIX_FMT_BGR24 ? 3 : 4);
222  pic->data[0] = utv->buffer + utv->buf_size + pic->linesize[0];
223  break;
224  }
225 
226  *got_frame = 1;
227  av_frame_move_ref((AVFrame*)data, pic);
228 
229  return avpkt->size;
230 }
231 
232  static av_cold int utvideo_decode_close(AVCodecContext *avctx)
233 {
234  UtVideoContext *utv = (UtVideoContext *)avctx->priv_data;
235 
236  /* Free output */
237  av_frame_free(&avctx->coded_frame);
238  av_freep(&utv->buffer);
239 
240  /* Finish decoding and clean up the instance */
241  utv->codec->DecodeEnd();
242  CCodec::DeleteInstance(utv->codec);
243 
244  return 0;
245 }
246 
247  AVCodec ff_libutvideo_decoder = {
248  "libutvideo",
249  NULL_IF_CONFIG_SMALL("Ut Video"),
250  AVMEDIA_TYPE_VIDEO,
251  AV_CODEC_ID_UTVIDEO,
252  0, //capabilities
253  NULL, //supported_framerates
254  NULL, //pix_fmts
255  NULL, //supported_samplerates
256  NULL, //sample_fmts
257  NULL, //channel_layouts
258  0, //max_lowres
259  NULL, //priv_class
260  NULL, //profiles
261  sizeof(UtVideoContext),
262  NULL, //next
263  NULL, //init_thread_copy
264  NULL, //update_thread_context
265  NULL, //defaults
266  NULL, //init_static_data
267  utvideo_decode_init,
268  NULL, //encode
269  NULL, //encode2
270  utvideo_decode_frame,
271  utvideo_decode_close,
272 };
AVCOL_SPC_BT709
also ITU-R BT1361 / IEC 61966-2-4 xvYCC709 / SMPTE RP177 Annex B
Definition: pixfmt.h:422
NULL
#define NULL
Definition: coverity.c:32
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:181
h
h
Definition: vp9dsp_template.c:2093
data
ptrdiff_t const GLvoid * data
Definition: opengl_enc.c:101
imgutils.h
misc image utilities
AVPacket::size
int size
Definition: avcodec.h:1468
b
const char * b
Definition: vf_curves.c:109
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:1752
av_frame_move_ref
void av_frame_move_ref(AVFrame *dst, AVFrame *src)
Move everything contained in src to dst and reset src.
Definition: frame.c:496
AVCodecContext::bits_per_raw_sample
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
Definition: avcodec.h:2924
AVCodec
AVCodec.
Definition: avcodec.h:3392
uint8_t
uint8_t
Definition: audio_convert.c:194
av_cold
#define av_cold
Definition: attributes.h:82
av_malloc
#define av_malloc(s)
Definition: tableprint_vlc.h:31
av_frame_alloc
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
Definition: frame.c:141
UtVideoContext::buffer
uint8_t * buffer
Definition: libutvideo.h:68
AVCodecContext::extradata
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
Definition: avcodec.h:1647
AVPacket::data
uint8_t * data
Definition: avcodec.h:1467
get_bits.h
bitstream reader API header.
AVFrame::interlaced_frame
int interlaced_frame
The content of the picture is interlaced.
Definition: frame.h:312
av_log
#define av_log(a,...)
Definition: tableprint_vlc.h:28
av_image_get_buffer_size
int av_image_get_buffer_size(enum AVPixelFormat pix_fmt, int width, int height, int align)
Return the size in bytes of the amount of data required to store an image with the given parameters...
Definition: imgutils.c:361
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
av_frame_free
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
Definition: frame.c:154
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:176
AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:266
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:1711
AV_CODEC_ID_UTVIDEO
Definition: avcodec.h:260
libutvideo.h
Known FOURCCs: 'ULY0' (YCbCr 4:2:0), 'ULY2' (YCbCr 4:2:2), 'ULRG' (RGB), 'ULRA' (RGBA), 'ULH0' (YCbCr 4:2:0 BT.709), 'ULH2' (YCbCr 4:2:2 BT.709)
AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
Definition: pixfmt.h:66
AVCodecContext::height
int height
Definition: avcodec.h:1711
UTVF_NFCC_BGR_BU
#define UTVF_NFCC_BGR_BU
Definition: libutvideo.h:42
avcodec.h
Libavcodec external API header.
AVCodecContext
main external API structure.
Definition: avcodec.h:1532
AV_PIX_FMT_RGB32
#define AV_PIX_FMT_RGB32
Definition: pixfmt.h:307
format
static const char * format
Definition: movenc-test.c:47
AVCodecContext::codec_tag
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
Definition: avcodec.h:1564
AV_PIX_FMT_YUYV422
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
Definition: pixfmt.h:64
in
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){if(!*ac) return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));if(!ac) returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=ff_sample_fmt_is_planar(in_fmt, channels);out_planar=ff_sample_fmt_is_planar(out_fmt, channels);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);if(ARCH_AARCH64) ff_audio_convert_init_aarch64(ac);if(ARCH_ARM) ff_audio_convert_init_arm(ac);if(ARCH_X86) ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_log(ac->avr, AV_LOG_TRACE,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> in
Definition: audio_convert.c:194
AVCodecContext::extradata_size
int extradata_size
Definition: avcodec.h:1648
utvideo_decode_close
static av_cold int utvideo_decode_close(AVCodecContext *avctx)
Definition: libutvideodec.cpp:232
AVCodecContext::colorspace
enum AVColorSpace colorspace
YUV colorspace type.
Definition: avcodec.h:2255
AV_PIX_FMT_YUV422P10
#define AV_PIX_FMT_YUV422P10
Definition: pixfmt.h:331
UtVideoContext::buf_size
unsigned int buf_size
Definition: libutvideo.h:67
AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
Definition: pixfmt.h:63
if
if(ret< 0)
Definition: vf_mcdeint.c:282
AVCodecContext::coded_frame
attribute_deprecated AVFrame * coded_frame
the picture in the bitstream
Definition: avcodec.h:2945
UtVideoContext::codec
CCodec * codec
Definition: libutvideo.h:66
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:1574
AVFrame::top_field_first
int top_field_first
If the content is interlaced, is top field displayed first.
Definition: frame.h:317
utvideo_decode_init
static av_cold int utvideo_decode_init(AVCodecContext *avctx)
Definition: libutvideodec.cpp:36
ff_libutvideo_decoder
AVCodec ff_libutvideo_decoder
Definition: libutvideodec.cpp:247
av_freep
#define av_freep(p)
Definition: tableprint_vlc.h:35
AVMEDIA_TYPE_VIDEO
Definition: avutil.h:193
utvideo_decode_frame
static int utvideo_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: libutvideodec.cpp:141
MKTAG
#define MKTAG(a, b, c, d)
Definition: common.h:342
AV_RL32
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
Definition: bytestream.h:87
AVPacket
This structure stores compressed data.
Definition: avcodec.h:1444
for
for(j=16;j >0;--j)
Definition: h264pred_template.c:469
a
a
Definition: h264pred_template.c:468
UTVF_NFCC_BGRA_BU
#define UTVF_NFCC_BGRA_BU
Definition: libutvideo.h:46
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