Go to the documentation of this file.
106 memset(
context->palette->data, 0xff, 4);
139 frame->linesize[0] *= -1;
145 #define SCALE16(x, bits) (((x) << (16 - (bits))) | ((x) >> (2 * (bits) - 16)))
150 #define MKSCALE16(name, r16, w16) \
151 static void name(AVCodecContext *avctx, uint8_t * dst, const uint8_t *buf, int buf_size, int packed) \
155 for (i = 0; i + 1 < buf_size; i += 2) \
156 w16(dst + i, SCALE16(r16(buf + i), avctx->bits_per_coded_sample)); \
159 init_get_bits(&gb, buf, buf_size * 8); \
160 for (i = 0; i < avctx->width * avctx->height; i++) { \
161 int sample = get_bits(&gb, avctx->bits_per_coded_sample); \
162 w16(dst + i*2, SCALE16(sample, avctx->bits_per_coded_sample)); \
175 const uint8_t *buf = avpkt->data;
176 int buf_size = avpkt->size;
177 int linesize_align = 4;
184 if (avctx->width <= 0) {
188 if (avctx->height <= 0) {
194 stride = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
198 stride = avpkt->size / avctx->height;
202 if (
stride == 0 || avpkt->size <
stride * avctx->height) {
209 if ((avctx->bits_per_coded_sample == 8 || avctx->bits_per_coded_sample == 4 ||
210 avctx->bits_per_coded_sample == 2 || avctx->bits_per_coded_sample == 1 ||
211 (avctx->bits_per_coded_sample == 0 && (
context->is_nut_pal8 ||
context->is_mono)) ) &&
213 (!avctx->codec_tag || avctx->codec_tag ==
MKTAG(
'r',
'a',
'w',
' ') ||
217 int row_bytes = avctx->width / 8 + (avctx->width & 7 ? 1 : 0);
236 frame->key_frame = 1;
242 frame->pkt_pos = avctx->internal->last_pkt_props->pos;
243 frame->pkt_duration = avctx->internal->last_pkt_props->duration;
246 frame->interlaced_frame = 1;
262 int i, j, row_pix = 0;
265 if (avctx->bits_per_coded_sample == 8 ||
context->is_nut_pal8 ||
context->is_mono) {
266 int pix_per_byte =
context->is_mono ? 8 : 1;
267 for (
i = 0, j = 0; j < buf_size &&
i<avpkt->size;
i++, j++) {
269 row_pix += pix_per_byte;
270 if (row_pix >= avctx->width) {
272 j += 16 - (j % 16) - 1;
276 }
else if (avctx->bits_per_coded_sample == 4) {
277 for (
i = 0, j = 0; 2 * j + 1 < buf_size &&
i<avpkt->size;
i++, j++) {
278 dst[2 * j + 0] = buf[
i] >> 4;
279 dst[2 * j + 1] = buf[
i] & 15;
281 if (row_pix >= avctx->width) {
283 j += 8 - (j % 8) - 1;
287 }
else if (avctx->bits_per_coded_sample == 2) {
288 for (
i = 0, j = 0; 4 * j + 3 < buf_size &&
i<avpkt->size;
i++, j++) {
289 dst[4 * j + 0] = buf[
i] >> 6;
290 dst[4 * j + 1] = buf[
i] >> 4 & 3;
291 dst[4 * j + 2] = buf[
i] >> 2 & 3;
292 dst[4 * j + 3] = buf[
i] & 3;
294 if (row_pix >= avctx->width) {
296 j += 4 - (j % 4) - 1;
301 av_assert0(avctx->bits_per_coded_sample == 1);
302 for (
i = 0, j = 0; 8 * j + 7 < buf_size &&
i<avpkt->size;
i++, j++) {
303 dst[8 * j + 0] = buf[
i] >> 7;
304 dst[8 * j + 1] = buf[
i] >> 6 & 1;
305 dst[8 * j + 2] = buf[
i] >> 5 & 1;
306 dst[8 * j + 3] = buf[
i] >> 4 & 1;
307 dst[8 * j + 4] = buf[
i] >> 3 & 1;
308 dst[8 * j + 5] = buf[
i] >> 2 & 1;
309 dst[8 * j + 6] = buf[
i] >> 1 & 1;
310 dst[8 * j + 7] = buf[
i] & 1;
312 if (row_pix >= avctx->width) {
314 j += 2 - (j % 2) - 1;
321 }
else if (
context->is_lt_16bpp) {
323 int packed = (avctx->codec_tag & 0xFFFFFF) ==
MKTAG(
'B',
'I',
'T', 0);
324 int swap = avctx->codec_tag >> 24;
326 if (packed && swap) {
331 context->bbdsp.bswap16_buf(
context->bitstream_buf, (
const uint16_t*)buf, buf_size / 2);
333 context->bbdsp.bswap_buf(
context->bitstream_buf, (
const uint32_t*)buf, buf_size / 4);
340 scale16be(avctx, dst, buf, buf_size, packed);
342 scale16le(avctx, dst, buf, buf_size, packed);
345 }
else if (need_copy) {
346 memcpy(
frame->buf[0]->data, buf, buf_size);
347 buf =
frame->buf[0]->data;
350 if (avctx->codec_tag ==
MKTAG(
'A',
'V',
'1',
'x') ||
351 avctx->codec_tag ==
MKTAG(
'A',
'V',
'u',
'p'))
352 buf += buf_size -
context->frame_size;
355 if (buf_size <
len && ((avctx->codec_tag & 0xFFFFFF) !=
MKTAG(
'B',
'I',
'T', 0) || !need_copy)) {
356 av_log(avctx,
AV_LOG_ERROR,
"Invalid buffer size, packet size %d < expected frame_size %d\n", buf_size,
len);
363 avctx->width, avctx->height, 1)) < 0) {
393 frame->palette_has_changed = 1;
394 }
else if (
context->is_nut_pal8) {
395 int vid_size = avctx->width * avctx->height;
396 int pal_size = avpkt->size - vid_size;
399 pal = avpkt->data + vid_size;
400 memcpy(
context->palette->data, pal, pal_size);
401 frame->palette_has_changed = 1;
415 FFALIGN(
frame->linesize[0], linesize_align) * avctx->height <= buf_size)
419 FFALIGN(
frame->linesize[0], linesize_align) * avctx->height +
420 FFALIGN(
frame->linesize[1], linesize_align) * ((avctx->height + 1) / 2) <= buf_size) {
422 frame->data[1] += (la0 -
frame->linesize[0]) * avctx->height;
423 frame->linesize[0] = la0;
430 if (!
frame->buf[1]) {
438 ((
frame->linesize[0] + 3) & ~3) * avctx->height <= buf_size)
439 frame->linesize[0] = (
frame->linesize[0] + 3) & ~3;
444 if (avctx->codec_tag ==
MKTAG(
'Y',
'V',
'1',
'2') ||
445 avctx->codec_tag ==
MKTAG(
'Y',
'V',
'1',
'6') ||
446 avctx->codec_tag ==
MKTAG(
'Y',
'V',
'2',
'4') ||
447 avctx->codec_tag ==
MKTAG(
'Y',
'V',
'U',
'9'))
450 if (avctx->codec_tag ==
AV_RL32(
"I420") && (avctx->width+1)*(avctx->height+1) * 3/2 == buf_size) {
451 frame->data[1] =
frame->data[1] + (avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height;
452 frame->data[2] =
frame->data[2] + ((avctx->width+1)*(avctx->height+1) -avctx->width*avctx->height)*5/4;
455 if (avctx->codec_tag ==
AV_RL32(
"yuv2") &&
459 for (y = 0; y < avctx->height; y++) {
460 for (
x = 0;
x < avctx->width;
x++)
461 line[2 *
x + 1] ^= 0x80;
466 if (avctx->codec_tag ==
AV_RL32(
"b64a") &&
471 for (y = 0; y < avctx->height; y++) {
472 for (
x = 0;
x >> 3 < avctx->width;
x += 8) {
474 AV_WB64(&dst[
x], v << 16 | v >> 48);
476 dst +=
frame->linesize[0];
481 frame->interlaced_frame = 1;
483 frame->top_field_first = 1;
static av_cold int raw_init_decoder(AVCodecContext *avctx)
static av_cold int init(AVCodecContext *avctx)
AVBufferRef * av_buffer_alloc(int size)
Allocate an AVBuffer of the given size using av_malloc().
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 AV_OPT_FLAG_VIDEO_PARAM
#define FFSWAP(type, a, b)
const AVPixFmtDescriptor * av_pix_fmt_desc_get(enum AVPixelFormat pix_fmt)
#define MKTAG(a, b, c, d)
This structure describes decoded (raw) audio or video data.
@ AV_PIX_FMT_RGBA64BE
packed RGBA 16:16:16:16, 64bpp, 16R, 16G, 16B, 16A, the 2-byte value for each R/G/B/A component is st...
unsigned int bitstream_buf_size
@ AV_PKT_DATA_PALETTE
An AV_PKT_DATA_PALETTE side data packet contains exactly AVPALETTE_SIZE bytes worth of palette.
@ AV_PIX_FMT_MONOWHITE
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb.
@ AV_PIX_FMT_BGR24
packed RGB 8:8:8, 24bpp, BGRBGR...
int av_get_bits_per_pixel(const AVPixFmtDescriptor *pixdesc)
Return the number of bits per pixel used by the pixel format described by pixdesc.
@ AV_PIX_FMT_RGB555BE
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), big-endian , X=unused/undefined
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
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
const PixelFormatTag ff_raw_pix_fmt_tags[]
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
static const AVOption options[]
#define av_assert0(cond)
assert() equivalent, that is always enabled.
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
int avpriv_set_systematic_pal2(uint32_t pal[256], enum AVPixelFormat pix_fmt)
enum AVPixelFormat avpriv_find_pix_fmt(const PixelFormatTag *tags, unsigned int fourcc)
uint8_t * av_packet_get_side_data(const AVPacket *pkt, enum AVPacketSideDataType type, int *size)
Get side information from packet.
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 default minimum maximum flags name is the option keep it simple and lowercase description are in without and describe what they for example set the foo of the bar offset is the offset of the field in your context
@ AV_PIX_FMT_RGB565LE
packed RGB 5:6:5, 16bpp, (msb) 5R 6G 5B(lsb), little-endian
#define LIBAVUTIL_VERSION_INT
Describe the class of an AVClass context structure.
av_cold void ff_bswapdsp_init(BswapDSPContext *c)
void av_buffer_unref(AVBufferRef **buf)
Free a given reference and automatically free the buffer if there are no more references to it.
@ AV_PIX_FMT_YUYV422
packed YUV 4:2:2, 16bpp, Y0 Cb Y1 Cr
@ AV_PIX_FMT_MONOBLACK
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb.
@ AV_PICTURE_TYPE_I
Intra.
@ AV_PIX_FMT_GRAY8
Y , 8bpp.
@ AV_PIX_FMT_RGB24
packed RGB 8:8:8, 24bpp, RGBRGB...
static void flip(AVCodecContext *avctx, AVFrame *frame)
#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.
#define AV_PIX_FMT_FLAG_PSEUDOPAL
The pixel format is "pseudo-paletted".
const PixelFormatTag avpriv_pix_fmt_bps_mov[]
int av_buffer_make_writable(AVBufferRef **pbuf)
Create a writable reference from a given buffer reference, avoiding data copy if possible.
#define MKSCALE16(name, r16, w16)
Scale buffer to 16 bits per coded sample resolution.
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.
int bits_per_coded_sample
bits per sample/pixel from the demuxer (needed for huffyuv).
@ AV_PIX_FMT_RGB555LE
packed RGB 5:5:5, 16bpp, (msb)1X 5R 5G 5B(lsb), little-endian, X=unused/undefined
#define i(width, name, range_min, range_max)
uint8_t * extradata
some codecs need / can use extradata like Huffman tables.
static int raw_decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
void av_fast_padded_malloc(void *ptr, unsigned int *size, size_t min_size)
Same behaviour av_fast_malloc but the buffer has additional AV_INPUT_BUFFER_PADDING_SIZE at the end w...
#define AV_OPT_FLAG_DECODING_PARAM
a generic parameter which can be set by the user for demuxing or decoding
#define AV_PIX_FMT_FLAG_BE
Pixel format is big-endian.
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
@ AV_PIX_FMT_NV12
planar YUV 4:2:0, 12bpp, 1 plane for Y and 1 plane for the UV components, which are interleaved (firs...
const char * class_name
The name of the class; usually it is the same name as the context structure type to which the AVClass...
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
static av_cold int raw_close_decoder(AVCodecContext *avctx)
int ff_decode_frame_props(AVCodecContext *avctx, AVFrame *frame)
Set various frame properties from the codec context / packet data.
main external API structure.
const PixelFormatTag avpriv_pix_fmt_bps_avi[]
static const AVClass rawdec_class
AVBufferRef * av_buffer_ref(AVBufferRef *buf)
Create a new reference to an AVBuffer.
#define AV_CODEC_CAP_PARAM_CHANGE
Codec supports changed parameters at any point.
A reference to a data buffer.
Descriptor that unambiguously describes how the bits of a pixel are stored in the up to 4 data planes...
unsigned int codec_tag
fourcc (LSB first, so "ABCD" -> ('D'<<24) + ('C'<<16) + ('B'<<8) + 'A').
This structure stores compressed data.
#define AVERROR_INVALIDDATA
Invalid data found when processing input.
int av_image_check_size(unsigned int w, unsigned int h, int log_offset, void *log_ctx)
Check if the given dimension of an image is valid, meaning that all bytes of the image can be address...
#define AV_PIX_FMT_FLAG_PAL
Pixel format has a palette in data[1], values are indexes in this palette.
AVCodec ff_rawvideo_decoder