23 #define UNCHECKED_BITSTREAM_READER 1
25 #include "libavutil/opt.h"
37 #define SPRITE_TRAJ_VLC_BITS 6
39 #define MB_TYPE_B_VLC_BITS 4
62 int16_t *ac_val, *ac_val1;
74 if(s->
mb_x==0 || s->
qscale == qscale_table[xy] || n==1 || n==3){
90 if(s->
mb_y==0 || s->
qscale == qscale_table[xy] || n==2 || n==3){
135 v|= 0x7F >> (7-(bits_count&7));
148 for(len=0; len<32; len++){
172 int d[4][2]={{0,0}, {0,0}, {0,0}, {0,0}};
173 int sprite_ref[4][2];
174 int virtual_ref[2][2];
181 if (w <= 0 || h <= 0)
205 while((1<<alpha)<w) alpha++;
206 while((1<<beta )<h) beta++;
212 sprite_ref[0][0]= a*vop_ref[0][0] + d[0][0];
213 sprite_ref[0][1]= a*vop_ref[0][1] + d[0][1];
214 sprite_ref[1][0]= a*vop_ref[1][0] + d[0][0] + d[1][0];
215 sprite_ref[1][1]= a*vop_ref[1][1] + d[0][1] + d[1][1];
216 sprite_ref[2][0]= a*vop_ref[2][0] + d[0][0] + d[2][0];
217 sprite_ref[2][1]= a*vop_ref[2][1] + d[0][1] + d[2][1];
219 sprite_ref[0][0]= (a>>1)*(2*vop_ref[0][0] + d[0][0]);
220 sprite_ref[0][1]= (a>>1)*(2*vop_ref[0][1] + d[0][1]);
221 sprite_ref[1][0]= (a>>1)*(2*vop_ref[1][0] + d[0][0] + d[1][0]);
222 sprite_ref[1][1]= (a>>1)*(2*vop_ref[1][1] + d[0][1] + d[1][1]);
223 sprite_ref[2][0]= (a>>1)*(2*vop_ref[2][0] + d[0][0] + d[2][0]);
224 sprite_ref[2][1]= (a>>1)*(2*vop_ref[2][1] + d[0][1] + d[2][1]);
233 virtual_ref[0][0]= 16*(vop_ref[0][0] + w2)
234 +
ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + w2*(r*sprite_ref[1][0] - 16*vop_ref[1][0])),w);
235 virtual_ref[0][1]= 16*vop_ref[0][1]
236 +
ROUNDED_DIV(((w - w2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + w2*(r*sprite_ref[1][1] - 16*vop_ref[1][1])),w);
237 virtual_ref[1][0]= 16*vop_ref[0][0]
238 +
ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][0] - 16*vop_ref[0][0]) + h2*(r*sprite_ref[2][0] - 16*vop_ref[2][0])),h);
239 virtual_ref[1][1]= 16*(vop_ref[0][1] + h2)
240 +
ROUNDED_DIV(((h - h2)*(r*sprite_ref[0][1] - 16*vop_ref[0][1]) + h2*(r*sprite_ref[2][1] - 16*vop_ref[2][1])),h);
259 s->
sprite_offset[1][0]= ((sprite_ref[0][0]>>1)|(sprite_ref[0][0]&1)) - a*(vop_ref[0][0]/2);
260 s->
sprite_offset[1][1]= ((sprite_ref[0][1]>>1)|(sprite_ref[0][1]&1)) - a*(vop_ref[0][1]/2);
270 + (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][0])
271 + ( r*sprite_ref[0][1] - virtual_ref[0][1])*(-vop_ref[0][1])
272 + (1<<(alpha+rho-1));
274 + (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-vop_ref[0][0])
275 + (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-vop_ref[0][1])
276 + (1<<(alpha+rho-1));
277 s->
sprite_offset[1][0]= ( (-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][0] + 1)
278 +( r*sprite_ref[0][1] - virtual_ref[0][1])*(-2*vop_ref[0][1] + 1)
279 +2*w2*r*sprite_ref[0][0]
281 + (1<<(alpha+rho+1)));
282 s->
sprite_offset[1][1]= ( (-r*sprite_ref[0][1] + virtual_ref[0][1])*(-2*vop_ref[0][0] + 1)
283 +(-r*sprite_ref[0][0] + virtual_ref[0][0])*(-2*vop_ref[0][1] + 1)
284 +2*w2*r*sprite_ref[0][1]
286 + (1<<(alpha+rho+1)));
287 s->
sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0]);
288 s->
sprite_delta[0][1]= (+r*sprite_ref[0][1] - virtual_ref[0][1]);
289 s->
sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1]);
290 s->
sprite_delta[1][1]= (-r*sprite_ref[0][0] + virtual_ref[0][0]);
296 min_ab=
FFMIN(alpha, beta);
299 s->
sprite_offset[0][0]= (sprite_ref[0][0]<<(alpha+beta+rho-min_ab))
300 + (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-vop_ref[0][0])
301 + (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-vop_ref[0][1])
302 + (1<<(alpha+beta+rho-min_ab-1));
303 s->
sprite_offset[0][1]= (sprite_ref[0][1]<<(alpha+beta+rho-min_ab))
304 + (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-vop_ref[0][0])
305 + (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-vop_ref[0][1])
306 + (1<<(alpha+beta+rho-min_ab-1));
307 s->
sprite_offset[1][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3*(-2*vop_ref[0][0] + 1)
308 + (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3*(-2*vop_ref[0][1] + 1)
309 + 2*w2*h3*r*sprite_ref[0][0]
311 + (1<<(alpha+beta+rho-min_ab+1));
312 s->
sprite_offset[1][1]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3*(-2*vop_ref[0][0] + 1)
313 + (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3*(-2*vop_ref[0][1] + 1)
314 + 2*w2*h3*r*sprite_ref[0][1]
316 + (1<<(alpha+beta+rho-min_ab+1));
317 s->
sprite_delta[0][0]= (-r*sprite_ref[0][0] + virtual_ref[0][0])*h3;
318 s->
sprite_delta[0][1]= (-r*sprite_ref[0][0] + virtual_ref[1][0])*w3;
319 s->
sprite_delta[1][0]= (-r*sprite_ref[0][1] + virtual_ref[0][1])*h3;
320 s->
sprite_delta[1][1]= (-r*sprite_ref[0][1] + virtual_ref[1][1])*w3;
377 int header_extension=0, mb_num,
len;
382 for(len=0; len<32; len++){
414 if(header_extension){
420 check_marker(&s->
gb,
"before time_increment in video packed header");
422 check_marker(&s->
gb,
"before vop_coding_type in video packed header");
464 int x,
y, mb_v, sum, dx, dy,
shift;
480 if(n) dy -= 1<<(shift + a + 1);
481 else dx -= 1<<(shift + a + 1);
498 if (sum < -len) sum= -
len;
499 else if (sum >= len) sum= len-1;
518 if (code < 0 || code > 9 ){
530 level =
get_bits(&s->
gb, code-1) + (1<<(code-1));
532 level = -
get_bits(&s->
gb, code-1) - (1<<(code-1));
557 static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
607 if(dc_pred_dir) dir|=1;
611 int mx, my, pred_x, pred_y,
bits;
631 mot_val[0 ]= mot_val[2 ]=
633 mot_val[1 ]= mot_val[3 ]=
656 mot_val[0 ]= mot_val[2 ]=
658 mot_val[1 ]= mot_val[3 ]=
668 if ((cbpc & 16) == 0) {
687 mot_val[0 ]= mot_val[2 ] =
689 mot_val[1 ]= mot_val[3 ]=
722 static const int8_t quant_tab[4] = { -1, -2, 1, 2 };
770 if(dc_pred_dir) dir|=1;
797 if(mb_num >= mb_count)
return 0;
861 int n,
int coded,
int intra,
int rvlc)
902 if (dc_pred_dir == 0)
932 qadd = (s->
qscale - 1) | 1;
970 level= level * qmul + qadd;
983 if (cache&0x80000000) {
984 if (cache&0x40000000) {
1011 if(s->error_recognition >= FF_ER_COMPLIANT){
1012 const int abs_level=
FFABS(level);
1014 const int run1= run - rl->
max_run[last][abs_level] - 1;
1015 if(abs_level <= rl->max_level[last][run]){
1019 if(s->error_recognition > FF_ER_COMPLIANT){
1020 if(abs_level <= rl->max_level[last][run]*2){
1024 if(run1 >= 0 && abs_level <= rl->max_level[last][run1]){
1032 if (level>0) level= level * qmul + qadd;
1033 else level= level * qmul - qadd;
1035 if((
unsigned)(level + 2048) > 4095){
1037 if(level > 2560 || level<-2560){
1042 level= level<0 ? -2048 : 2047;
1051 i+= run + rl->
max_run[run>>7][level/qmul] +1;
1060 level = level + rl->
max_level[run>>7][(run-1)&63] * qmul;
1077 block[scan_table[i]] =
level;
1081 block[scan_table[i]] =
level;
1162 for (i = 0; i < 6; i++) {
1189 int16_t
block[6][64])
1191 int cbpc, cbpy, i, cbp, pred_x, pred_y, mx, my, dquant;
1193 static int8_t quant_tab[4] = { -1, -2, 1, 2 };
1240 cbp = (cbpc & 3) | (cbpy << 2);
1248 if ((cbpc & 16) == 0) {
1255 s->
mv[0][0][0] = mx;
1256 s->
mv[0][0][1] = my;
1276 s->
mv[0][i][0] = mx;
1277 s->
mv[0][i][1] = my;
1293 s->
mv[0][0][0] = mx;
1294 s->
mv[0][0][1] = my;
1308 s->
mv[0][i][0] = mx;
1309 s->
mv[0][i][1] = my;
1424 s->
last_mv[0][i][0]= s->
mv[0][i][0] = mx;
1425 s->
last_mv[0][i][1]= (s->
mv[0][i][1] = my)*2;
1435 s->
last_mv[1][i][0]= s->
mv[1][i][0] = mx;
1436 s->
last_mv[1][i][1]= (s->
mv[1][i][1] = my)*2;
1477 cbp = (cbpc & 3) | (cbpy << 2);
1490 for (i = 0; i < 6; i++) {
1499 for (i = 0; i < 6; i++) {
1532 int hours, minutes, seconds;
1544 s->
time_base= seconds + 60*(minutes + 60*hours);
1586 int chroma_format=
get_bits(gb, 2);
1660 if (vo_ver_id == 1) {
1707 for(i=0; i<64; i++){
1721 for(i=0; i<64; i++){
1743 for(i=0; i<64; i++){
1771 int estimation_method=
get_bits(gb, 2);
1772 if(estimation_method<2){
1787 if(!
check_marker(gb,
"in complexity estimation part 1")){
1805 if(!
check_marker(gb,
"in complexity estimation part 2")){
1809 if(estimation_method==1){
1829 if(vo_ver_id != 1) {
1848 int h_sampling_factor_n;
1849 int h_sampling_factor_m;
1850 int v_sampling_factor_n;
1851 int v_sampling_factor_m;
1856 h_sampling_factor_n=
get_bits(gb, 5);
1857 h_sampling_factor_m=
get_bits(gb, 5);
1858 v_sampling_factor_n=
get_bits(gb, 5);
1859 v_sampling_factor_m=
get_bits(gb, 5);
1862 if( h_sampling_factor_n==0 || h_sampling_factor_m==0
1863 || v_sampling_factor_n==0 || v_sampling_factor_m==0){
1897 int ver = 0, build = 0, ver2 = 0, ver3 = 0;
1907 e=sscanf(buf,
"DivX%dBuild%d%c", &ver, &build, &last);
1909 e=sscanf(buf,
"DivX%db%d%c", &ver, &build, &last);
1916 "wasteful way to store B-frames ('packed B-frames'). "
1917 "Consider using a tool like VirtualDub or avidemux to fix it.\n");
1923 e=sscanf(buf,
"FFmpe%*[^b]b%d", &build)+3;
1925 e=sscanf(buf,
"FFmpeg v%d.%d.%d / libavcodec build: %d", &ver, &ver2, &ver3, &build);
1927 e=sscanf(buf,
"Lavc%d.%d.%d", &ver, &ver2, &ver3)+1;
1929 build= (ver<<16) + (ver2<<8) + ver3;
1932 if(strcmp(buf,
"ffmpeg")==0){
1941 e=sscanf(buf,
"XviD%d", &build);
1950 int time_incr, time_increment;
1971 av_log(s->
avctx,
AV_LOG_ERROR,
"hmm, seems the headers are not complete, trying to guess time_increment_bits\n");
2137 av_log(s->
avctx,
AV_LOG_DEBUG,
"qp:%d fc:%d,%d %s size:%d pro:%d alt:%d top:%d %spel part:%d resync:%d w:%d a:%d rnd:%d vot:%d%s dc:%d ce:%d/%d/%d time:%"PRId64
" tincr:%d\n",
2156 if(load_backward_shape){
2166 av_log(s->
avctx,
AV_LOG_WARNING,
"looks like this file was encoded with (divx4/(old)xvid/opendivx) -> forcing low_delay flag\n");
2190 unsigned startcode,
v;
2213 startcode = ((startcode << 8) | v) & 0xffffffff;
2215 if((startcode&0xFFFFFF00) != 0x100)
2250 if(startcode >= 0x120 && startcode <= 0x12F){
2278 static int done = 0;
2356 "MPEG4 Video Decoder",
2363 "MPEG4 Video VDPAU Decoder",
2390 #if CONFIG_MPEG4_VDPAU_DECODER
2391 AVCodec ff_mpeg4_vdpau_decoder = {
2392 .
name =
"mpeg4_vdpau",
static unsigned int show_bits_long(GetBitContext *s, int n)
Show 0-32 bits.
#define FF_PROFILE_MPEG4_MAIN
static int decode_vop_header(MpegEncContext *s, GetBitContext *gb)
void ff_init_block_index(MpegEncContext *s)
ScanTable intra_v_scantable
static int shift(int a, int b)
RLTable ff_mpeg4_rl_intra
const uint8_t ff_mpeg4_c_dc_scale_table[32]
int time_increment_bits
number of bits to represent the fractional part of time
#define MV_TYPE_FIELD
2 vectors, one per field
const uint8_t * y_dc_scale_table
qscale -> y_dc_scale table
int vol_control_parameters
does the stream contain the low_delay flag, used to workaround buggy encoders
static const AVProfile profiles[]
int sprite_warping_accuracy
int last_mv[2][2][2]
last MV, used for MV prediction in MPEG1 & B-frame MPEG4
#define SLICE_NOEND
no end marker or error found but mb count exceeded
static unsigned int get_bits(GetBitContext *s, int n)
Read 1-25 bits.
#define AV_LOG_WARNING
Something somehow does not look correct.
#define FF_PROFILE_MPEG4_BASIC_ANIMATED_TEXTURE
#define LIBAVUTIL_VERSION_INT
static void skip_bits_long(GetBitContext *s, int n)
#define MB_TYPE_B_VLC_BITS
static av_cold int init(AVCodecContext *avctx)
VLC ff_h263_intra_MCBPC_vlc
static int mpeg4_is_resync(MpegEncContext *s)
check if the next stuff is a resync marker or the end.
#define CODEC_CAP_TRUNCATED
uint16_t chroma_intra_matrix[64]
static int mpeg4_decode_gop_header(MpegEncContext *s, GetBitContext *gb)
int16_t(*[3] ac_val)[16]
used for mpeg4 AC prediction, all 3 arrays must be continuous
int v_edge_pos
horizontal / vertical position of the right/bottom edge (pixel replication)
#define SKIP_COUNTER(name, gb, num)
uint16_t chroma_inter_matrix[64]
AVRational sample_aspect_ratio
sample aspect ratio (0 if unknown) That is the width of a pixel divided by the height of the pixel...
static av_cold int decode_init(AVCodecContext *avctx)
void av_log(void *avcl, int level, const char *fmt,...) av_printf_format(3
Send the specified message to the log if the level is less than or equal to the current av_log_level...
static int decode_vol_header(MpegEncContext *s, GetBitContext *gb)
int real_sprite_warping_points
int num_sprite_warping_points
int mb_num
number of MBs of a picture
int t_frame
time distance of first I -> B, used for interlaced b frames
uint16_t sprite_traj[4][2]
sprite trajectory points
int time_base
time in seconds of last I,P,S Frame
int16_t * ff_h263_pred_motion(MpegEncContext *s, int block, int dir, int *px, int *py)
#define USES_LIST(a, list)
does this mb use listX, note does not work if subMBs
void ff_clean_intra_table_entries(MpegEncContext *s)
Clean dc, ac, coded_block for the current non-intra MB.
#define FF_PROFILE_MPEG4_HYBRID
AVRational time_base
This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...
#define FF_PROFILE_MPEG4_ADVANCED_SCALABLE_TEXTURE
int ff_mpeg4_decode_partitions(MpegEncContext *s)
Decode the first and second partition.
int intra_dc_threshold
QP above whch the ac VLC should be used for intra dc.
int sprite_shift[2]
sprite shift [isChroma]
#define USER_DATA_STARTCODE
int mb_num_left
number of MBs left in this video packet (for partitioned Slices only)
int64_t time
time of current frame
int8_t * max_run[2]
encoding & decoding
const uint8_t ff_alternate_vertical_scan[64]
#define MV_DIRECT
bidirectional mode where the difference equals the MV of the last P/S/I-Frame (mpeg4) ...
const char * av_default_item_name(void *ctx)
Return the context name.
#define FF_PROFILE_MPEG4_SCALABLE_TEXTURE
static int mpeg4_decode_mb(MpegEncContext *s, int16_t block[6][64])
#define INIT_VLC_STATIC(vlc, bits, a, b, c, d, e, f, g, static_size)
const uint16_t ff_mpeg4_resync_prefix[8]
const uint16_t ff_sprite_trajectory_tab[15][2]
MPEG4 HW decoding with VDPAU, data[0] contains a vdpau_render_state struct which contains the bitstre...
static av_cold int end(AVCodecContext *avctx)
uint8_t * pred_dir_table
used to store pred_dir for partitioned decoding
Multithreading support functions.
#define CODEC_CAP_HWACCEL_VDPAU
Codec can export data for HW decoding (VDPAU).
int64_t pts
Presentation timestamp in time_base units (time when frame should be shown to user).
const char * name
Name of the codec implementation.
int no_rounding
apply no rounding to motion compensation (MPEG4, msmpeg4, ...) for b-frames rounding mode is always 0...
int resync_marker
could this stream contain resync markers
Picture current_picture
copy of the current picture structure.
const uint8_t ff_mpeg4_DCtab_chrom[13][2]
#define CODEC_CAP_DR1
Codec uses get_buffer() for allocating buffers and supports custom allocators.
int cplx_estimation_trash_b
static int get_bits_count(const GetBitContext *s)
int8_t * max_level[2]
encoding & decoding
struct AVCodecInternal * internal
Private context used for internal data.
int showed_packed_warning
flag for having shown the warning about divxs invalid b frames
uint16_t pp_time
time distance between the last 2 p,s,i frames
uint8_t idct_permutation[64]
idct input permutation.
#define AV_LOG_VERBOSE
Detailed information.
int mb_height
number of MBs horizontally & vertically
#define FF_PROFILE_MPEG4_N_BIT
int codec_tag
internal codec_tag upper case converted from avctx codec_tag
#define FF_PROFILE_MPEG4_SIMPLE_FACE_ANIMATION
const AVRational ff_h263_pixel_aspect[16]
enum AVChromaLocation chroma_sample_location
This defines the location of chroma samples.
static int ff_mpeg4_pred_dc(MpegEncContext *s, int n, int level, int *dir_ptr, int encoding)
Predict the dc.
static void ff_update_block_index(MpegEncContext *s)
void ff_set_qscale(MpegEncContext *s, int qscale)
set qscale and update qscale dependent variables.
int sprite_offset[2][2]
sprite offset[isChroma][isMVY]
static int mpeg4_decode_sprite_trajectory(MpegEncContext *s, GetBitContext *gb)
static int get_bits_left(GetBitContext *gb)
int16_t * dc_val[3]
used for mpeg4 DC prediction, all 3 arrays must be continuous
#define FF_ASPECT_EXTENDED
void ff_thread_await_progress(ThreadFrame *f, int n, int field)
Wait for earlier decoding threads to finish reference pictures.
#define UPDATE_CACHE(name, gb)
static double alpha(void *priv, double x, double y)
#define AV_LOG_ERROR
Something went wrong and cannot losslessly be recovered.
int has_b_frames
Size of the frame reordering buffer in the decoder.
uint8_t pi<< 24) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0f/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_U8, uint8_t,(*(constuint8_t *) pi-0x80)*(1.0/(1<< 7))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S16, int16_t,(*(constint16_t *) pi >>8)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0f/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S16, int16_t,*(constint16_t *) pi *(1.0/(1<< 15))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_S32, int32_t,(*(constint32_t *) pi >>24)+0x80) CONV_FUNC_GROUP(AV_SAMPLE_FMT_FLT, float, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0f/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_DBL, double, AV_SAMPLE_FMT_S32, int32_t,*(constint32_t *) pi *(1.0/(1U<< 31))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_FLT, float, av_clip_uint8(lrintf(*(constfloat *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_FLT, float, av_clip_int16(lrintf(*(constfloat *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_FLT, float, av_clipl_int32(llrintf(*(constfloat *) pi *(1U<< 31)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_U8, uint8_t, AV_SAMPLE_FMT_DBL, double, av_clip_uint8(lrint(*(constdouble *) pi *(1<< 7))+0x80)) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S16, int16_t, AV_SAMPLE_FMT_DBL, double, av_clip_int16(lrint(*(constdouble *) pi *(1<< 15)))) CONV_FUNC_GROUP(AV_SAMPLE_FMT_S32, int32_t, AV_SAMPLE_FMT_DBL, double, av_clipl_int32(llrint(*(constdouble *) pi *(1U<< 31))))#defineSET_CONV_FUNC_GROUP(ofmt, ifmt) staticvoidset_generic_function(AudioConvert *ac){}voidff_audio_convert_free(AudioConvert **ac){return;ff_dither_free(&(*ac) ->dc);av_freep(ac);}AudioConvert *ff_audio_convert_alloc(AVAudioResampleContext *avr, enumAVSampleFormatout_fmt, enumAVSampleFormatin_fmt, intchannels, intsample_rate, intapply_map){AudioConvert *ac;intin_planar, out_planar;ac=av_mallocz(sizeof(*ac));returnNULL;ac->avr=avr;ac->out_fmt=out_fmt;ac->in_fmt=in_fmt;ac->channels=channels;ac->apply_map=apply_map;if(avr->dither_method!=AV_RESAMPLE_DITHER_NONE &&av_get_packed_sample_fmt(out_fmt)==AV_SAMPLE_FMT_S16 &&av_get_bytes_per_sample(in_fmt)>2){ac->dc=ff_dither_alloc(avr, out_fmt, in_fmt, channels, sample_rate, apply_map);if(!ac->dc){av_free(ac);returnNULL;}returnac;}in_planar=av_sample_fmt_is_planar(in_fmt);out_planar=av_sample_fmt_is_planar(out_fmt);if(in_planar==out_planar){ac->func_type=CONV_FUNC_TYPE_FLAT;ac->planes=in_planar?ac->channels:1;}elseif(in_planar) ac->func_type=CONV_FUNC_TYPE_INTERLEAVE;elseac->func_type=CONV_FUNC_TYPE_DEINTERLEAVE;set_generic_function(ac);ff_audio_convert_init_arm(ac);ff_audio_convert_init_x86(ac);returnac;}intff_audio_convert(AudioConvert *ac, AudioData *out, AudioData *in){intuse_generic=1;intlen=in->nb_samples;intp;if(ac->dc){av_dlog(ac->avr,"%dsamples-audio_convert:%sto%s(dithered)\n", len, av_get_sample_fmt_name(ac->in_fmt), av_get_sample_fmt_name(ac->out_fmt));returnff_convert_dither(ac-> dc
void ff_er_add_slice(ERContext *s, int startx, int starty, int endx, int endy, int status)
Add a slice.
int mb_skipped
MUST BE SET only during DECODING.
#define CODEC_CAP_DELAY
Encoder or decoder requires flushing with NULL input at the end in order to give the complete and cor...
int partitioned_frame
is current frame partitioned
void ff_mpeg4_pred_ac(MpegEncContext *s, int16_t *block, int n, int dir)
Predict the ac.
const uint8_t ff_alternate_horizontal_scan[64]
int cplx_estimation_trash_p
#define NULL_IF_CONFIG_SMALL(x)
Return NULL if CONFIG_SMALL is true, otherwise the argument without modification. ...
#define AV_LOG_DEBUG
Stuff which is only useful for libav* developers.
#define INTER_MCBPC_VLC_BITS
#define FF_DEBUG_STARTCODE
void ff_mpeg4_init_direct_mv(MpegEncContext *s)
int quarter_sample
1->qpel, 0->half pel ME/MC
int low_delay
no reordering needed / has no b-frames
#define FF_PROFILE_MPEG4_CORE
int(* decode_mb)(struct MpegEncContext *s, int16_t block[6][64])
#define CLOSE_READER(name, gb)
#define INIT_VLC_RL(rl, static_size)
AVPixelFormat
Pixel format.
#define CODEC_FLAG_LOW_DELAY
Force low delay.
static int check_marker(GetBitContext *s, const char *msg)
void ff_mpeg4videodec_static_init(void)
#define GET_RL_VLC(level, run, name, gb, table, bits,max_depth, need_update)
void ff_mpeg_flush(AVCodecContext *avctx)
#define SKIP_BITS(name, gb, num)
#define ONLY_IF_THREADS_ENABLED(x)
Define a function with only the non-default version specified.
int resync_mb_x
x position of last resync marker
int ff_h263_decode_init(AVCodecContext *avctx)
int sprite_delta[2][2]
sprite_delta [isY][isMVY]
const uint8_t ff_mpeg4_DCtab_lum[13][2]
uint8_t ff_mpeg4_static_rl_table_store[3][2][2 *MAX_RUN+MAX_LEVEL+3]
VLC ff_h263_inter_MCBPC_vlc
#define FF_PROFILE_MPEG4_ADVANCED_REAL_TIME
int ff_h263_decode_frame(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
static const int mb_type_b_map[4]
int err_recognition
Error recognition; may misdetect some more or less valid parts as errors.
#define CODEC_CAP_DRAW_HORIZ_BAND
Decoder can use draw_horiz_band callback.
const uint8_t ff_mpeg4_y_dc_scale_table[32]
void(* clear_blocks)(int16_t *blocks)
static int mpeg4_decode_dc(MpegEncContext *s, int n, int *dir_ptr)
Decode the dc value.
#define MB_TYPE_INTERLACED
static int mpeg4_decode_block(MpegEncContext *s, int16_t *block, int n, int coded, int intra, int rvlc)
Decode a block.
int16_t(*[2] motion_val)[2]
Picture * current_picture_ptr
pointer to the current picture
enum AVPixelFormat ff_h263_hwaccel_pixfmt_list_420[]
static unsigned int show_bits(GetBitContext *s, int n)
Show 1-25 bits.
#define FF_PROFILE_MPEG4_CORE_SCALABLE
#define LAST_SKIP_BITS(name, gb, num)
static av_always_inline int get_vlc2(GetBitContext *s, VLC_TYPE(*table)[2], int bits, int max_depth)
Parse a vlc code.
#define FF_PROFILE_MPEG4_SIMPLE
int block_last_index[12]
last non zero coefficient in block
#define FF_PROFILE_UNKNOWN
const int16_t ff_mpeg4_default_non_intra_matrix[64]
uint8_t * mbintra_table
used to avoid setting {ac, dc, cbp}-pred stuff to zero on inter MB decoding
#define AV_EF_AGGRESSIVE
consider things that a sane encoder should not do as an error
int ff_mpeg_update_thread_context(AVCodecContext *dst, const AVCodecContext *src)
RL_VLC_ELEM * rl_vlc[32]
decoding only
#define SHOW_UBITS(name, gb, num)
int sprite_brightness_change
#define SPRITE_TRAJ_VLC_BITS
int block_index[6]
index to current MB in block based arrays with edges
static void flush(AVCodecContext *avctx)
#define MV_TYPE_16X16
1 vector for the whole mb
int first_slice_line
used in mpeg4 too to handle resync markers
static int mpeg4_decode_partitioned_mb(MpegEncContext *s, int16_t block[6][64])
decode partition C of one MB.
#define AV_LOG_INFO
Standard information.
uint16_t inter_matrix[64]
#define FF_PROFILE_MPEG4_SIMPLE_SCALABLE
int cplx_estimation_trash_i
#define FF_BUG_NO_PADDING
#define FF_PROFILE_MPEG4_ADVANCED_SIMPLE
main external API structure.
static void close(AVCodecParserContext *s)
ScanTable intra_scantable
#define AV_EF_BITSTREAM
detect bitstream specification deviations
int height
picture size. must be a multiple of 16
static int get_xbits(GetBitContext *s, int n)
read mpeg1 dc style vlc (sign bit + mantisse with no MSB).
#define OPEN_READER(name, gb)
av_cold void ff_init_scantable(uint8_t *permutation, ScanTable *st, const uint8_t *src_scantable)
#define SLICE_END
end marker found
int data_partitioning
data partitioning flag from header
static unsigned int get_bits1(GetBitContext *s)
BYTE int const BYTE int int int height
static void skip_bits1(GetBitContext *s)
Describe the class of an AVClass context structure.
ScanTable intra_h_scantable
static void skip_bits(GetBitContext *s, int n)
static const AVProfile mpeg4_video_profiles[]
uint8_t * cbp_table
used to store cbp, ac_pred for partitioned decoding
#define GET_CACHE(name, gb)
#define FF_BUG_XVID_ILACE
DSPContext dsp
pointers for accelerated dsp functions
#define SKIP_CACHE(name, gb, num)
const int16_t ff_mpeg4_default_intra_matrix[64]
int allocate_progress
Whether to allocate progress for frame threading.
int f_code
forward MV resolution
static int decode_new_pred(MpegEncContext *s, GetBitContext *gb)
static unsigned int get_bits_long(GetBitContext *s, int n)
Read 0-32 bits.
int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my)
static int mpeg4_decode_partition_a(MpegEncContext *s)
Decode first partition.
int pict_type
AV_PICTURE_TYPE_I, AV_PICTURE_TYPE_P, AV_PICTURE_TYPE_B, ...
#define ROUNDED_DIV(a, b)
const uint8_t ff_mpeg4_dc_threshold[8]
int h263_pred
use mpeg4/h263 ac/dc predictions
#define FF_DEBUG_PICT_INFO
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s)
uint16_t pb_field_time
like above, just for interlaced
const uint8_t * c_dc_scale_table
qscale -> c_dc_scale table
static const AVClass mpeg4_vdpau_class
int mv[2][4][2]
motion vectors for a macroblock first coordinate : 0 = forward 1 = backward second " : depend...
int b8_stride
2*mb_width+1 used for some 8x8 block arrays to allow simple addressing
Picture * next_picture_ptr
pointer to the next picture (for bidir pred)
struct AVCodecContext * avctx
#define SHOW_SBITS(name, gb, num)
static VLC sprite_trajectory
static const AVOption mpeg4_options[]
common internal api header.
const uint8_t ff_zigzag_direct[64]
int mb_stride
mb_width+1 used for some arrays to allow simple addressing of left & top MBs without sig11 ...
#define CODEC_CAP_FRAME_THREADS
Codec supports frame-level multithreading.
#define FF_PROFILE_MPEG4_SIMPLE_STUDIO
static int mpeg4_decode_partition_b(MpegEncContext *s, int mb_count)
decode second partition.
static const AVClass mpeg4_class
int ff_h263_decode_end(AVCodecContext *avctx)
#define AVERROR_INVALIDDATA
int resync_mb_y
y position of last resync marker
av_cold void ff_init_rl(RLTable *rl, uint8_t static_store[2][2 *MAX_RUN+MAX_LEVEL+3])
int16_t(* block)[64]
points to one of the following blocks
VLC_TYPE(* table)[2]
code, bits
Picture next_picture
copy of the next picture structure.
static const uint8_t * align_get_bits(GetBitContext *s)
static int mpeg4_decode_profile_level(MpegEncContext *s, GetBitContext *gb)
int chroma_qscale
chroma QP
int ff_h263_decode_motion(MpegEncContext *s, int pred, int f_code)
int flags
AVCodecContext.flags (HQ, MV4, ...)
uint16_t intra_matrix[64]
matrix transmitted in the bitstream
static int decode_user_data(MpegEncContext *s, GetBitContext *gb)
Decode the user data stuff in the header.
int workaround_bugs
workaround bugs in encoders which cannot be detected automatically
ScanTable inter_scantable
if inter == intra then intra should be used to reduce tha cache usage
int ff_mpeg4_decode_video_packet_header(MpegEncContext *s)
Decode the next video packet.
#define FRAME_SKIPPED
return value for header parsers if frame is not coded
#define FF_PROFILE_MPEG4_ADVANCED_CODING
static int decode(AVCodecContext *avctx, void *data, int *got_frame, AVPacket *avpkt)
int ff_mpeg4_decode_picture_header(MpegEncContext *s, GetBitContext *gb)
Decode mpeg4 headers.
#define FF_PROFILE_MPEG4_ADVANCED_CORE
#define MV_TYPE_8X8
4 vectors (h263, mpeg4 4MV)
#define AV_EF_COMPLIANT
consider all spec non compliancies as errors
int b_code
backward MV resolution for B Frames (mpeg4)
static int get_amv(MpegEncContext *s, int n)
Get the average motion vector for a GMC MB.
const uint8_t ff_mb_type_b_tab[4][2]
#define AV_NOPTS_VALUE
Undefined timestamp value.
#define INTRA_MCBPC_VLC_BITS
uint16_t pb_time
time distance between the last b and p,s,i frame
#define av_assert2(cond)
assert() equivalent, that does lie in speed critical code.