33 for (i=0; i<n/2; i++) {
34 ((uint16_t *)dst)[
i] =
AV_RB16(src+2*i);
43 int buf_size = avpkt->
size;
46 int i, j, k, n, linesize,
h, upgrade = 0, is_mono = 0;
48 int components, sample_len,
ret;
101 n = avctx->
width * 2;
106 n = avctx->
width * 2;
113 n = avctx->
width * 4;
121 n = (avctx->
width + 7) >> 3;
130 if(s->
type < 4 || (is_mono && s->
type==7)){
131 for (i=0; i<avctx->
height; i++) {
134 for(j=0; j<avctx->
width * components; j++){
147 for (k = 0; k < 6 && c <= 9; k += 1) {
156 if (sample_len == 16) {
157 ((uint16_t*)ptr)[j] = (((1<<sample_len)-1)*v + (s->
maxval>>1))/s->
maxval;
161 if (sample_len != 16)
166 for (i = 0; i < avctx->
height; i++) {
169 else if (upgrade == 1) {
171 for (j = 0; j < n; j++)
173 }
else if (upgrade == 2) {
174 unsigned int j, v,
f = (65535 * 32768 + s->
maxval / 2) / s->
maxval;
175 for (j = 0; j < n / 2; j++) {
177 ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
189 unsigned char *ptr1, *ptr2;
198 for (i = 0; i < avctx->
height; i++) {
207 for (i = 0; i <
h; i++) {
219 uint16_t *ptr1, *ptr2;
223 n = avctx->
width * 2;
228 for (i = 0; i < avctx->
height; i++) {
229 for (j = 0; j < n / 2; j++) {
231 ((uint16_t *)ptr)[j] = (v * f + 16384) >> 15;
236 ptr1 = (uint16_t*)p->
data[1];
237 ptr2 = (uint16_t*)p->
data[2];
240 for (i = 0; i <
h; i++) {
241 for (j = 0; j < n / 2; j++) {
243 ptr1[j] = (v * f + 16384) >> 15;
247 for (j = 0; j < n / 2; j++) {
249 ptr2[j] = (v * f + 16384) >> 15;
261 scale = 1.f / s->
scale;
265 r = (
float *)p->
data[2];
266 g = (
float *)p->
data[0];
267 b = (
float *)p->
data[1];
268 for (
int i = 0; i < avctx->
height; i++) {
269 for (
int j = 0; j < avctx->
width; j++) {
283 r = (
float *)p->
data[2];
284 g = (
float *)p->
data[0];
285 b = (
float *)p->
data[1];
286 for (
int i = 0; i < avctx->
height; i++) {
287 for (
int j = 0; j < avctx->
width; j++) {
307 #if CONFIG_PGM_DECODER 319 #if CONFIG_PGMYUV_DECODER 331 #if CONFIG_PPM_DECODER 343 #if CONFIG_PBM_DECODER 355 #if CONFIG_PAM_DECODER 367 #if CONFIG_PFM_DECODER #define AVERROR_INVALIDDATA
Invalid data found when processing input.
This structure describes decoded (raw) audio or video data.
ptrdiff_t const GLvoid * data
static void put_bits(Jpeg2000EncoderContext *s, int val, int n)
put n times val bit
packed RGB 8:8:8, 24bpp, RGBRGB...
static av_always_inline float av_int2float(uint32_t i)
Reinterpret a 32-bit integer as a float.
#define AV_PIX_FMT_RGBA64
int maxval
maximum value of a pixel
enum AVPixelFormat pix_fmt
Pixel format, see AV_PIX_FMT_xxx.
AVCodec ff_pgmyuv_decoder
int bits_per_raw_sample
Bits per sample/pixel of internal libavcodec pixel/sample format.
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_WB32 unsigned int_TMPL AV_WB24 unsigned int_TMPL AV_RB16
static void decode(AVCodecContext *dec_ctx, AVPacket *pkt, AVFrame *frame, FILE *outfile)
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_WL32 unsigned int_TMPL AV_WL24 unsigned int_TMPL AV_WL16 uint64_t_TMPL AV_WB64 unsigned int_TMPL AV_RB32
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
const char * name
Name of the codec implementation.
packed RGBA 8:8:8:8, 32bpp, RGBARGBA...
enum AVPictureType pict_type
Picture type of the frame.
#define AV_PIX_FMT_GRAY16
int width
picture width / height.
#define AV_PIX_FMT_YUV420P16
Libavcodec external API header.
int ff_pnm_decode_header(AVCodecContext *avctx, PNMContext *const s)
int linesize[AV_NUM_DATA_POINTERS]
For video, size in bytes of each picture line.
main external API structure.
int ff_get_buffer(AVCodecContext *avctx, AVFrame *frame, int flags)
Get a buffer for a frame.
#define AV_PIX_FMT_YUV420P10
#define AV_PIX_FMT_YUV420P9
static void samplecpy(uint8_t *dst, const uint8_t *src, int n, int maxval)
uint8_t * data[AV_NUM_DATA_POINTERS]
pointer to the picture/channel planes.
static int pnm_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
#define AV_PIX_FMT_GBRPF32
Y , 1bpp, 0 is black, 1 is white, in each byte pixels are ordered from the msb to the lsb...
planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples)
common internal api header.
static void flush_put_bits(PutBitContext *s)
Pad the end of the output stream with zeros.
Y , 1bpp, 0 is white, 1 is black, in each byte pixels are ordered from the msb to the lsb...
static void init_put_bits(PutBitContext *s, uint8_t *buffer, int buffer_size)
Initialize the PutBitContext s.
uint8_t * bytestream_start
int key_frame
1 -> keyframe, 0-> not
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
uint64_t_TMPL AV_WL64 unsigned int_TMPL AV_RL32
This structure stores compressed data.
#define AV_CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.