FFmpeg  4.3
truemotion2rt.c
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1 /*
2  * Duck TrueMotion 2.0 Real Time decoder
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 Lesser General Public
8  * License as published by the Free Software Foundation; either
9  * version 2.1 of the License, or (at your option) any later version.
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  * Lesser General Public License for more details.
15  *
16  * You should have received a copy of the GNU Lesser 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 #include <stdio.h>
22 #include <stdlib.h>
23 #include <string.h>
24 
25 #include "libavutil/imgutils.h"
26 #include "libavutil/internal.h"
27 #include "libavutil/intreadwrite.h"
28 #include "libavutil/mem.h"
29 
30 #define BITSTREAM_READER_LE
31 #include "avcodec.h"
32 #include "get_bits.h"
33 #include "internal.h"
34 
35 typedef struct TrueMotion2RTContext {
38  int hscale;
40 
41 static const int16_t delta_tab2[] = {
42  5, -7, 36, -36,
43 };
44 
45 static const int16_t delta_tab3[] = {
46  2, -3, 8, -8, 18, -18, 36, -36,
47 };
48 
49 static const int16_t delta_tab4[] = {
50  1, -1, 2, -3, 8, -8, 18, -18, 36, -36, 54, -54, 96, -96, 144, -144,
51 };
52 
53 static const int16_t *const delta_tabs[] = {
55 };
56 
57 /* Returns the number of bytes consumed from the bytestream, or
58  * AVERROR_INVALIDDATA if there was an error while decoding the header. */
59 static int truemotion2rt_decode_header(AVCodecContext *avctx, const AVPacket *avpkt)
60 {
62  int header_size;
63  uint8_t header_buffer[128] = { 0 }; /* logical maximum header size */
64  const uint8_t *buf = avpkt->data;
65  int size = avpkt->size;
66  int width, height;
67  int ret, i;
68 
69  if (size < 1) {
70  av_log(avctx, AV_LOG_ERROR, "input packet too small (%d)\n", size);
71  return AVERROR_INVALIDDATA;
72  }
73 
74  header_size = ((buf[0] >> 5) | (buf[0] << 3)) & 0x7f;
75  if (header_size < 10) {
76  av_log(avctx, AV_LOG_ERROR, "invalid header size (%d)\n", header_size);
77  return AVERROR_INVALIDDATA;
78  }
79 
80  if (header_size + 1 > size) {
81  av_log(avctx, AV_LOG_ERROR, "input packet too small (%d)\n", size);
82  return AVERROR_INVALIDDATA;
83  }
84 
85  /* unscramble the header bytes with a XOR operation */
86  for (i = 1; i < header_size; i++)
87  header_buffer[i - 1] = buf[i] ^ buf[i + 1];
88 
89  s->delta_size = header_buffer[1];
90  s->hscale = 1 + !!header_buffer[3];
91  if (s->delta_size < 2 || s->delta_size > 4)
92  return AVERROR_INVALIDDATA;
93 
94  height = AV_RL16(header_buffer + 5);
95  width = AV_RL16(header_buffer + 7);
96 
97  ret = ff_set_dimensions(avctx, width, height);
98  if (ret < 0)
99  return ret;
100 
101  av_log(avctx, AV_LOG_DEBUG, "Header size: %d\n", header_size);
102  return header_size;
103 }
104 
106  int *got_frame, AVPacket *avpkt)
107 {
108  TrueMotion2RTContext *s = avctx->priv_data;
109  AVFrame * const p = data;
110  GetBitContext *gb = &s->gb;
111  uint8_t *dst;
112  int x, y, delta_mode;
113  int ret;
114 
115  ret = truemotion2rt_decode_header(avctx, avpkt);
116  if (ret < 0)
117  return ret;
118 
119  if ((avctx->width + s->hscale - 1)/ s->hscale * avctx->height * s->delta_size > avpkt->size * 8LL * 4)
120  return AVERROR_INVALIDDATA;
121 
122  ret = init_get_bits8(gb, avpkt->data + ret, avpkt->size - ret);
123  if (ret < 0)
124  return ret;
125 
126  ret = ff_get_buffer(avctx, p, 0);
127  if (ret < 0)
128  return ret;
129 
130  skip_bits(gb, 32);
131  delta_mode = s->delta_size - 2;
132  dst = p->data[0];
133  for (y = 0; y < avctx->height; y++) {
134  int diff = 0;
135  for (x = 0; x < avctx->width; x += s->hscale) {
136  diff += delta_tabs[delta_mode][get_bits(gb, s->delta_size)];
137  dst[x] = av_clip_uint8((y ? dst[x - p->linesize[0]] : 0) + diff);
138  }
139  dst += p->linesize[0];
140  }
141 
142  if (s->hscale > 1) {
143  dst = p->data[0];
144  for (y = 0; y < avctx->height; y++) {
145  for (x = 1; x < avctx->width; x += s->hscale)
146  dst[x] = dst[x - 1];
147  dst += p->linesize[0];
148  }
149  }
150 
151  dst = p->data[0];
152  for (y = 0; y < avctx->height; y++) {
153  for (x = 0; x < avctx->width; x++)
154  dst[x] = av_clip_uint8(dst[x] + (dst[x] - 128) / 3);
155  dst += p->linesize[0];
156  }
157 
158  dst = p->data[1];
159  for (y = 0; y < avctx->height >> 2; y++) {
160  int diff = 0;
161  for (x = 0; x < avctx->width >> 2; x += s->hscale) {
162  diff += delta_tabs[delta_mode][get_bits(gb, s->delta_size)];
163  dst[x] = av_clip_uint8((y ? dst[x - p->linesize[1]] : 128) + diff);
164  }
165  dst += p->linesize[1];
166  }
167 
168  if (s->hscale > 1) {
169  dst = p->data[1];
170  for (y = 0; y < avctx->height >> 2; y++) {
171  for (x = 1; x < avctx->width >> 2; x += s->hscale)
172  dst[x] = dst[x - 1];
173  dst += p->linesize[1];
174  }
175  }
176 
177  dst = p->data[1];
178  for (y = 0; y < avctx->height >> 2; y++) {
179  for (x = 0; x < avctx->width >> 2; x++)
180  dst[x] += (dst[x] - 128) / 8;
181  dst += p->linesize[1];
182  }
183 
184  dst = p->data[2];
185  for (y = 0; y < avctx->height >> 2; y++) {
186  int diff = 0;
187  for (x = 0; x < avctx->width >> 2; x += s->hscale) {
188  diff += delta_tabs[delta_mode][get_bits(gb, s->delta_size)];
189  dst[x] = av_clip_uint8((y ? dst[x - p->linesize[2]] : 128) + diff);
190  }
191  dst += p->linesize[2];
192  }
193 
194  if (s->hscale > 1) {
195  dst = p->data[2];
196  for (y = 0; y < avctx->height >> 2; y++) {
197  for (x = 1; x < avctx->width >> 2; x += s->hscale)
198  dst[x] = dst[x - 1];
199  dst += p->linesize[2];
200  }
201  }
202 
203  dst = p->data[2];
204  for (y = 0; y < avctx->height >> 2; y++) {
205  for (x = 0; x < avctx->width >> 2; x++)
206  dst[x] += (dst[x] - 128) / 8;
207  dst += p->linesize[2];
208  }
209 
211  p->key_frame = 1;
212  *got_frame = 1;
213 
214  return avpkt->size;
215 }
216 
218 {
219  avctx->pix_fmt = AV_PIX_FMT_YUV410P;
220  return 0;
221 }
222 
224  .name = "truemotion2rt",
225  .long_name = NULL_IF_CONFIG_SMALL("Duck TrueMotion 2.0 Real Time"),
226  .type = AVMEDIA_TYPE_VIDEO,
228  .priv_data_size = sizeof(TrueMotion2RTContext),
231  .capabilities = AV_CODEC_CAP_DR1,
232  .caps_internal = FF_CODEC_CAP_INIT_THREADSAFE,
233 };
AV_CODEC_ID_TRUEMOTION2RT
@ AV_CODEC_ID_TRUEMOTION2RT
Definition: codec_id.h:262
AVCodec
AVCodec.
Definition: codec.h:190
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:40
init
static av_cold int init(AVCodecContext *avctx)
Definition: avrndec.c:35
AVFrame
This structure describes decoded (raw) audio or video data.
Definition: frame.h:300
internal.h
AVPacket::data
uint8_t * data
Definition: packet.h:355
data
const char data[16]
Definition: mxf.c:91
delta_tabs
static const int16_t *const delta_tabs[]
Definition: truemotion2rt.c:53
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:314
skip_bits
static void skip_bits(GetBitContext *s, int n)
Definition: get_bits.h:467
get_bits
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
Definition: get_bits.h:379
GetBitContext
Definition: get_bits.h:61
x
FFmpeg Automated Testing Environment ************************************Introduction Using FATE from your FFmpeg source directory Submitting the results to the FFmpeg result aggregation server Uploading new samples to the fate suite FATE makefile targets and variables Makefile targets Makefile variables Examples Introduction **************FATE is an extended regression suite on the client side and a means for results aggregation and presentation on the server side The first part of this document explains how you can use FATE from your FFmpeg source directory to test your ffmpeg binary The second part describes how you can run FATE to submit the results to FFmpeg’s FATE server In any way you can have a look at the publicly viewable FATE results by visiting this as it can be seen if some test on some platform broke with their recent contribution This usually happens on the platforms the developers could not test on The second part of this document describes how you can run FATE to submit your results to FFmpeg’s FATE server If you want to submit your results be sure to check that your combination of OS and compiler is not already listed on the above mentioned website In the third part you can find a comprehensive listing of FATE makefile targets and variables Using FATE from your FFmpeg source directory **********************************************If you want to run FATE on your machine you need to have the samples in place You can get the samples via the build target fate rsync Use this command from the top level source this will cause FATE to fail NOTE To use a custom wrapper to run the pass ‘ target exec’ to ‘configure’ or set the TARGET_EXEC Make variable Submitting the results to the FFmpeg result aggregation server ****************************************************************To submit your results to the server you should run fate through the shell script ‘tests fate sh’ from the FFmpeg sources This script needs to be invoked with a configuration file as its first argument tests fate sh path to fate_config A configuration file template with comments describing the individual configuration variables can be found at ‘doc fate_config sh template’ Create a configuration that suits your based on the configuration template The ‘slot’ configuration variable can be any string that is not yet but it is suggested that you name it adhering to the following pattern ‘ARCH OS COMPILER COMPILER VERSION’ The configuration file itself will be sourced in a shell therefore all shell features may be used This enables you to setup the environment as you need it for your build For your first test runs the ‘fate_recv’ variable should be empty or commented out This will run everything as normal except that it will omit the submission of the results to the server The following files should be present in $workdir as specified in the configuration it may help to try out the ‘ssh’ command with one or more ‘ v’ options You should get detailed output concerning your SSH configuration and the authentication process The only thing left is to automate the execution of the fate sh script and the synchronisation of the samples directory Uploading new samples to the fate suite *****************************************If you need a sample uploaded send a mail to samples request This is for developers who have an account on the fate suite server If you upload new please make sure they are as small as space on each network bandwidth and so on benefit from smaller test cases Also keep in mind older checkouts use existing sample that means in practice generally do not remove or overwrite files as it likely would break older checkouts or releases Also all needed samples for a commit should be ideally before the push If you need an account for frequently uploading samples or you wish to help others by doing that send a mail to ffmpeg devel rsync vauL Duo x
Definition: fate.txt:150
delta_tab2
static const int16_t delta_tab2[]
Definition: truemotion2rt.c:41
AVFrame::key_frame
int key_frame
1 -> keyframe, 0-> not
Definition: frame.h:378
AV_LOG_ERROR
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
Definition: log.h:176
av_cold
#define av_cold
Definition: attributes.h:90
init_get_bits8
static int init_get_bits8(GetBitContext *s, const uint8_t *buffer, int byte_size)
Initialize GetBitContext.
Definition: get_bits.h:677
TrueMotion2RTContext::hscale
int hscale
Definition: truemotion2rt.c:38
decode
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
Definition: decode_audio.c:71
width
#define width
intreadwrite.h
s
#define s(width, name)
Definition: cbs_vp9.c:257
ff_truemotion2rt_decoder
AVCodec ff_truemotion2rt_decoder
Definition: truemotion2rt.c:223
AV_LOG_DEBUG
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
Definition: log.h:197
get_bits.h
AV_RL16
#define AV_RL16
Definition: intreadwrite.h:42
delta_tab4
static const int16_t delta_tab4[]
Definition: truemotion2rt.c:49
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
TrueMotion2RTContext
Definition: truemotion2rt.c:35
AVFrame::pict_type
enum AVPictureType pict_type
Picture type of the frame.
Definition: frame.h:383
ff_get_buffer
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
Definition: decode.c:1854
AV_CODEC_CAP_DR1
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
Definition: codec.h:50
AVPacket::size
int size
Definition: packet.h:356
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:186
size
int size
Definition: twinvq_data.h:11134
height
#define height
TrueMotion2RTContext::gb
GetBitContext gb
Definition: truemotion2rt.c:36
delta_tab3
static const int16_t delta_tab3[]
Definition: truemotion2rt.c:45
i
#define i(width, name, range_min, range_max)
Definition: cbs_h2645.c:269
internal.h
truemotion2rt_decode_header
static int truemotion2rt_decode_header(AVCodecContext *avctx, const AVPacket *avpkt)
Definition: truemotion2rt.c:59
uint8_t
uint8_t
Definition: audio_convert.c:194
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:197
AVCodecContext::height
int height
Definition: avcodec.h:699
AVCodecContext::pix_fmt
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
Definition: avcodec.h:736
avcodec.h
ret
ret
Definition: filter_design.txt:187
TrueMotion2RTContext::delta_size
int delta_size
Definition: truemotion2rt.c:37
AVCodecContext
main external API structure.
Definition: avcodec.h:526
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
mem.h
ff_set_dimensions
int ff_set_dimensions(AVCodecContext *s, int width, int height)
Check that the provided frame dimensions are valid and set them on the codec context.
Definition: utils.c:104
diff
static av_always_inline int diff(const uint32_t a, const uint32_t b)
Definition: vf_palettegen.c:136
truemotion2rt_decode_frame
static int truemotion2rt_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: truemotion2rt.c:105
AVCodecContext::priv_data
void * priv_data
Definition: avcodec.h:553
AVPacket
This structure stores compressed data.
Definition: packet.h:332
AVCodecContext::width
int width
picture width / height.
Definition: avcodec.h:699
imgutils.h
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:331
AV_PIX_FMT_YUV410P
@ AV_PIX_FMT_YUV410P
planar YUV 4:1:0, 9bpp, (1 Cr & Cb sample per 4x4 Y samples)
Definition: pixfmt.h:72
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:59
truemotion2rt_decode_init
static av_cold int truemotion2rt_decode_init(AVCodecContext *avctx)
Definition: truemotion2rt.c:217