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34 #define BITSTREAM_READER_LE
39 #define EA_PREAMBLE_SIZE 8
40 #define kVGT_TAG MKTAG('k', 'V', 'G', 'T')
85 if (src_end -
src < 3)
90 while (
size > 0 &&
src < src_end) {
98 size1 = (((
src[0] & 31) + 1) << 2);
103 size2 = ((
src[0] & 0xC) << 6) +
src[3] + 5;
107 size1 = ((
src[1] & 0xC0) >> 6);
109 size2 = (
src[0] & 0x3F) + 4;
114 size2 = ((
src[0] & 0x1C) >> 2) + 3;
120 if (size1 > src_end -
src)
132 if (dst - dst_start <
offset)
153 int num_blocks_packed;
160 if(buf_end - buf < 12)
164 num_blocks_raw =
AV_RL16(&buf[2]);
165 num_blocks_packed =
AV_RL16(&buf[4]);
166 vector_bits =
AV_RL16(&buf[6]);
171 "Invalid value for motion vector bits: %d\n", vector_bits);
185 if (num_blocks_packed >
s->num_blocks_packed) {
187 if ((err =
av_reallocp(&
s->block_codebook, num_blocks_packed * 16)) < 0) {
188 s->num_blocks_packed = 0;
191 s->num_blocks_packed = num_blocks_packed;
195 mvbits = (
num_mvs * 2 * 10 + 31) & ~31;
197 if (buf_end - buf < (mvbits>>3) + 16*num_blocks_raw + 8*num_blocks_packed)
209 buf += num_blocks_raw * 16;
213 for (
i = 0;
i < num_blocks_packed;
i++) {
215 for (j = 0; j < 4; j++)
217 for (j = 0; j < 16; j++)
222 (
s->avctx->height / 4) * (
s->avctx->width / 4))
226 for (y = 0; y <
s->avctx->height / 4; y++)
227 for (
x = 0;
x <
s->avctx->width / 4;
x++) {
228 unsigned int vector =
get_bits(&gb, vector_bits);
230 ptrdiff_t src_stride;
233 int mx =
x * 4 +
s->mv_codebook[vector][0];
234 int my = y * 4 +
s->mv_codebook[vector][1];
236 if (mx < 0 || mx + 4 >
s->avctx->width ||
237 my < 0 || my + 4 >
s->avctx->height) {
242 src =
s->last_frame->data[0] + mx + my *
s->last_frame->linesize[0];
243 src_stride =
s->last_frame->linesize[0];
246 if (
offset < num_blocks_raw)
248 else if (
offset - num_blocks_raw < num_blocks_packed)
249 src =
s->block_codebook[
offset - num_blocks_raw];
255 for (j = 0; j < 4; j++)
256 for (
i = 0;
i < 4;
i++)
257 frame->data[0][(y * 4 + j) *
frame->linesize[0] + (
x * 4 +
i)] =
258 src[j * src_stride +
i];
265 void *
data,
int *got_frame,
269 int buf_size = avpkt->
size;
271 const uint8_t *buf_end = buf + buf_size;
283 if(buf_end - buf < 12) {
290 if (
s->avctx->width !=
s->width ||
s->avctx->height !=
s->height) {
303 if (buf_end - buf < 5) {
315 frame->key_frame = 1;
318 if (!
s->frame_buffer &&
322 if (
unpack(buf, buf_end,
s->frame_buffer,
s->avctx->width,
s->avctx->height) < 0) {
326 for (y = 0; y <
s->height; y++)
327 memcpy(
frame->data[0] + y *
frame->linesize[0],
328 s->frame_buffer + y *
s->width,
331 if (!
s->last_frame->data[0]) {
335 frame->key_frame = 0;
#define AV_LOG_WARNING
Something somehow does not look correct.
static av_cold int tgv_decode_init(AVCodecContext *avctx)
static av_cold int init(AVCodecContext *avctx)
static int get_bits_left(GetBitContext *gb)
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
static int tgv_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static const int num_mvs[RV34_MB_TYPES]
number of motion vectors in each macroblock type
void av_frame_free(AVFrame **frame)
Free the frame and any dynamically allocated objects in it, e.g.
This structure describes decoded (raw) audio or video data.
int num_blocks_packed
current length of block_codebook
static int init_get_bits(GetBitContext *s, const uint8_t *buffer, int bit_size)
Initialize GetBitContext.
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
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
AVFrame * av_frame_alloc(void)
Allocate an AVFrame and set its fields to default values.
int num_mvs
current length of mv_codebook
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
void av_memcpy_backptr(uint8_t *dst, int back, int cnt)
Overlapping memcpy() implementation.
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
#define AV_GET_BUFFER_FLAG_REF
The decoder will keep a reference to the frame and may reuse it later.
static int tgv_decode_inter(TgvContext *s, AVFrame *frame, const uint8_t *buf, const uint8_t *buf_end)
Decode inter-frame.
static int get_sbits(GetBitContext *s, int n)
void * av_mallocz(size_t size)
Allocate a memory block with alignment suitable for all memory accesses (including vectors if availab...
uint8_t(* block_codebook)[16]
Rational number (pair of numerator and denominator).
@ AV_PICTURE_TYPE_I
Intra.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
#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_frame_ref(AVFrame *dst, const AVFrame *src)
Set up a new reference to the data described by the source frame.
int av_reallocp(void *ptr, size_t size)
Allocate, reallocate, or free a block of memory through a pointer to a pointer.
uint32_t palette[AVPALETTE_COUNT]
int av_reallocp_array(void *ptr, size_t nmemb, size_t size)
Allocate, reallocate, or free an array through a pointer to a pointer.
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
static int unpack(const uint8_t *src, const uint8_t *src_end, uint8_t *dst, int width, int height)
Unpack buffer.
#define i(width, name, range_min, range_max)
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.
@ AV_PIX_FMT_PAL8
8 bits with AV_PIX_FMT_RGB32 palette
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
main external API structure.
static av_cold int tgv_decode_end(AVCodecContext *avctx)
@ 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.
This structure stores compressed data.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.