Go to the documentation of this file.
48 16, 11, 10, 16, 24, 40, 51, 61,
49 12, 12, 14, 19, 26, 58, 60, 55,
50 14, 13, 16, 24, 40, 57, 69, 56,
51 14, 17, 22, 29, 51, 87, 80, 62,
52 18, 22, 37, 56, 68, 109, 103, 77,
53 24, 35, 55, 64, 81, 104, 113, 92,
54 49, 64, 78, 87, 103, 121, 120, 101,
55 72, 92, 95, 98, 112, 100, 103, 99
59 17, 18, 24, 47, 99, 99, 99, 99,
60 18, 21, 26, 66, 99, 99, 99, 99,
61 24, 26, 56, 99, 99, 99, 99, 99,
62 47, 66, 99, 99, 99, 99, 99, 99,
63 99, 99, 99, 99, 99, 99, 99, 99,
64 99, 99, 99, 99, 99, 99, 99, 99,
65 99, 99, 99, 99, 99, 99, 99, 99,
66 99, 99, 99, 99, 99, 99, 99, 99
93 if (
size < 2 * 64 * 4) {
97 for (
i = 0;
i < 64;
i++, buf += 4)
99 for (
i = 0;
i < 64;
i++, buf += 4)
111 for (
i = 0;
i < 64;
i++) {
132 if (buf_size > INT_MAX/8)
140 if (!
c->decomp_buf) {
142 "Can't allocate decompression buffer.\n");
158 int buf_size = avpkt->
size;
161 int orig_size = buf_size;
168 NUV_UNCOMPRESSED =
'0',
170 NUV_RTJPEG_IN_LZO =
'2',
182 if (buf[0] ==
'D' && buf[1] ==
'R') {
194 if (buf_size < 12 || buf[0] !=
'V') {
200 case NUV_RTJPEG_IN_LZO:
203 if (
c->width < 16 ||
c->height < 16) {
216 case NUV_UNCOMPRESSED:
217 minsize =
c->width *
c->height * 3 / 2;
220 minsize =
c->width/16 * (
c->height/16) * 6;
225 case NUV_RTJPEG_IN_LZO:
231 if (buf_size < minsize / 4)
237 if (comptype == NUV_RTJPEG_IN_LZO || comptype == NUV_LZO) {
239 int inlen = buf_size;
248 if (
c->codec_frameheader) {
257 if (buf[0] !=
'V' &&
AV_RL16(&buf[4]) != 0x000c) {
268 buf_size = avpkt->
size;
276 if (size_change || keyframe) {
284 memset(
c->pic->data[0], 0, avctx->
height *
c->pic->linesize[0]);
285 memset(
c->pic->data[1], 0x80, avctx->
height *
c->pic->linesize[1] / 2);
286 memset(
c->pic->data[2], 0x80, avctx->
height *
c->pic->linesize[2] / 2);
290 c->pic->key_frame = keyframe;
294 case NUV_UNCOMPRESSED: {
298 height = buf_size /
c->width / 3 * 2;
304 case NUV_RTJPEG_IN_LZO:
311 memset(
c->pic->data[0], 0,
c->width *
c->height);
312 memset(
c->pic->data[1], 128,
c->width *
c->height / 4);
313 memset(
c->pic->data[2], 128,
c->width *
c->height / 4);
337 c->decomp_buf =
NULL;
static const uint8_t fallback_cquant[]
static av_cold int init(AVCodecContext *avctx)
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
#define MKTAG(a, b, c, d)
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
static void copy_frame(AVFrame *f, const uint8_t *src, int width, int height)
copy frame data from buffer to AVFrame, handling stride.
This structure describes decoded (raw) audio or video data.
static int codec_reinit(AVCodecContext *avctx, int width, int height, int quality)
trying all byte sequences megabyte in length and selecting the best looking sequence will yield cases to try But a word about quality
#define RTJPEG_HEADER_SIZE
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
void ff_rtjpeg_decode_init(RTJpegContext *c, int width, int height, const uint32_t *lquant, const uint32_t *cquant)
initialize an RTJpegContext, may be called multiple times
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
static int get_quant(AVCodecContext *avctx, NuvContext *c, const uint8_t *buf, int size)
extract quantization tables from codec data into our context
unsigned char * decomp_buf
@ AV_PIX_FMT_YUV420P
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
and forward the result(frame or status change) to the corresponding input. If nothing is possible
@ AV_PICTURE_TYPE_I
Intra.
int ff_rtjpeg_decode_frame_yuv420(RTJpegContext *c, AVFrame *f, const uint8_t *buf, int buf_size)
decode one rtjpeg YUV420 frame
Undefined Behavior In the C some operations are like signed integer dereferencing freed accessing outside allocated Undefined Behavior must not occur in a C it is not safe even if the output of undefined operations is unused The unsafety may seem nit picking but Optimizing compilers have in fact optimized code on the assumption that no undefined Behavior occurs Optimizing code based on wrong assumptions can and has in some cases lead to effects beyond the output of computations The signed integer overflow problem in speed critical code Code which is highly optimized and works with signed integers sometimes has the problem that often the output of the computation does not c
static av_cold int decode_end(AVCodecContext *avctx)
int av_lzo1x_decode(void *out, int *outlen, const void *in, int *inlen)
Decodes LZO 1x compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification.
int av_image_fill_arrays(uint8_t *dst_data[4], int dst_linesize[4], const uint8_t *src, enum AVPixelFormat pix_fmt, int width, int height, int align)
Setup the data pointers and linesizes based on the specified image parameters and the provided array.
int av_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
void ff_rtjpeg_init(RTJpegContext *c, AVCodecContext *avctx)
static void get_quant_quality(NuvContext *c, int quality)
set quantization tables from a quality value
#define i(width, name, range_min, range_max)
#define AV_LZO_OUTPUT_PADDING
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
#define FF_CODEC_CAP_INIT_CLEANUP
The codec allows calling the close function for deallocation even if the init function returned a fai...
void av_frame_unref(AVFrame *frame)
Unreference all the buffers referenced by frame and reset the frame fields.
const char * name
Name of the codec implementation.
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
int ff_reget_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Identical in function to ff_get_buffer(), except it reuses the existing buffer if available.
#define FF_REGET_BUFFER_FLAG_READONLY
the returned buffer does not need to be writable
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
#define AV_INPUT_BUFFER_PADDING_SIZE
main external API structure.
void av_image_copy(uint8_t *dst_data[4], int dst_linesizes[4], const uint8_t *src_data[4], const int src_linesizes[4], enum AVPixelFormat pix_fmt, int width, int height)
Copy image in src_data to dst_data.
static const uint8_t fallback_lquant[]
static void init_frame(FlacEncodeContext *s, int nb_samples)
@ AV_PICTURE_TYPE_P
Predicted.
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.
int frame_number
Frame counter, set by libavcodec.
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
This structure stores compressed data.
void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)
Allocate a buffer, reusing the given one if large enough.
static av_cold int decode_init(AVCodecContext *avctx)
int width
picture width / height.
#define flags(name, subs,...)
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
static int decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)