FFmpeg  4.3
ptx.c
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1 /*
2  * V.Flash PTX (.ptx) image decoder
3  * Copyright (c) 2007 Ivo van Poorten
4  *
5  * This file is part of FFmpeg.
6  *
7  * FFmpeg is free software; you can redistribute it and/or
8  * modify it under the terms of the GNU Lesser General Public
9  * License as published by the Free Software Foundation; either
10  * version 2.1 of the License, or (at your option) any later version.
11  *
12  * FFmpeg is distributed in the hope that it will be useful,
13  * but WITHOUT ANY WARRANTY; without even the implied warranty of
14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15  * Lesser General Public License for more details.
16  *
17  * You should have received a copy of the GNU Lesser General Public
18  * License along with FFmpeg; if not, write to the Free Software
19  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
20  */
21 
22 #include "libavutil/common.h"
23 #include "libavutil/intreadwrite.h"
24 #include "libavutil/imgutils.h"
25 #include "avcodec.h"
26 #include "internal.h"
27 
28 static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame,
29  AVPacket *avpkt) {
30  const uint8_t *buf = avpkt->data;
31  const uint8_t *buf_end = avpkt->data + avpkt->size;
32  AVFrame * const p = data;
33  unsigned int offset, w, h, y, stride, bytes_per_pixel;
34  int ret;
35  uint8_t *ptr;
36 
37  if (buf_end - buf < 14)
38  return AVERROR_INVALIDDATA;
39  offset = AV_RL16(buf);
40  w = AV_RL16(buf+8);
41  h = AV_RL16(buf+10);
42  bytes_per_pixel = AV_RL16(buf+12) >> 3;
43 
44  if (bytes_per_pixel != 2) {
45  avpriv_request_sample(avctx, "Image format not RGB15");
46  return AVERROR_PATCHWELCOME;
47  }
48 
50 
51  if (buf_end - buf < offset)
52  return AVERROR_INVALIDDATA;
53  if (offset != 0x2c)
54  avpriv_request_sample(avctx, "offset != 0x2c");
55 
56  buf += offset;
57 
58  if (buf_end - buf < w * bytes_per_pixel)
59  return AVERROR_INVALIDDATA;
60 
61  if ((ret = ff_set_dimensions(avctx, w, h)) < 0)
62  return ret;
63 
64  if ((ret = ff_get_buffer(avctx, p, 0)) < 0)
65  return ret;
66 
68 
69  ptr = p->data[0];
70  stride = p->linesize[0];
71 
72  for (y = 0; y < h && buf_end - buf >= w * bytes_per_pixel; y++) {
73  memcpy(ptr, buf, w*bytes_per_pixel);
74  ptr += stride;
75  buf += w*bytes_per_pixel;
76  }
77 
78  *got_frame = 1;
79 
80  if (y < h) {
81  av_log(avctx, AV_LOG_WARNING, "incomplete packet\n");
82  return avpkt->size;
83  }
84 
85  return offset + w*h*bytes_per_pixel;
86 }
87 
89  .name = "ptx",
90  .long_name = NULL_IF_CONFIG_SMALL("V.Flash PTX image"),
91  .type = AVMEDIA_TYPE_VIDEO,
92  .id = AV_CODEC_ID_PTX,
93  .decode = ptx_decode_frame,
94  .capabilities = AV_CODEC_CAP_DR1,
95 };
AVCodec
AVCodec.
Definition: codec.h:190
stride
int stride
Definition: mace.c:144
AV_LOG_WARNING
#define AV_LOG_WARNING
Something somehow does not look correct.
Definition: log.h:182
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
AVFrame::data
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
Definition: frame.h:314
intreadwrite.h
AV_RL16
#define AV_RL16
Definition: intreadwrite.h:42
AVERROR_PATCHWELCOME
#define AVERROR_PATCHWELCOME
Not yet implemented in FFmpeg, patches welcome.
Definition: error.h:62
AV_PICTURE_TYPE_I
@ AV_PICTURE_TYPE_I
Intra.
Definition: avutil.h:274
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
offset
it s the only field you need to keep assuming you have a context There is some magic you don t need to care about around this just let it vf offset
Definition: writing_filters.txt:86
ptx_decode_frame
static int ptx_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
Definition: ptx.c:28
common.h
uint8_t
uint8_t
Definition: audio_convert.c:194
AVCodec::name
const char * name
Name of the codec implementation.
Definition: codec.h:197
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
w
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 ug o o w
Definition: fate.txt:150
AVCodecContext
main external API structure.
Definition: avcodec.h:526
AVMEDIA_TYPE_VIDEO
@ AVMEDIA_TYPE_VIDEO
Definition: avutil.h:201
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
avpriv_request_sample
#define avpriv_request_sample(...)
Definition: tableprint_vlc.h:39
AV_PIX_FMT_BGR555LE
@ AV_PIX_FMT_BGR555LE
packed BGR 5:5:5, 16bpp, (msb)1X 5B 5G 5R(lsb), little-endian, X=unused/undefined
Definition: pixfmt.h:113
AVPacket
This structure stores compressed data.
Definition: packet.h:332
ff_ptx_decoder
AVCodec ff_ptx_decoder
Definition: ptx.c:88
imgutils.h
AVFrame::linesize
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
Definition: frame.h:331
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
h
h
Definition: vp9dsp_template.c:2038
AV_CODEC_ID_PTX
@ AV_CODEC_ID_PTX
Definition: codec_id.h:153