/*
- * MPEG1 encoder / MPEG2 decoder
+ * MPEG1 codec / MPEG2 decoder
* Copyright (c) 2000,2001 Fabrice Bellard.
*
* This library is free software; you can redistribute it and/or
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
+
+/**
+ * @file mpeg12.c
+ * MPEG1 codec / MPEG2 decoder.
+ */
+
//#define DEBUG
#include "avcodec.h"
#include "dsputil.h"
#include "mpeg12data.h"
-#if 1
-#define PRINT_QP(a, b) {}
-#else
-#define PRINT_QP(a, b) printf(a, b)
-#endif
/* Start codes. */
#define SEQ_END_CODE 0x000001b7
static void mpeg1_encode_block(MpegEncContext *s,
DCTELEM *block,
int component);
-static void mpeg1_encode_motion(MpegEncContext *s, int val);
+static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
static void mpeg1_skip_picture(MpegEncContext *s, int pict_num);
static inline int mpeg1_decode_block_inter(MpegEncContext *s,
DCTELEM *block,
int n);
static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred);
-static UINT16 mv_penalty[MAX_FCODE+1][MAX_MV*2+1];
-static UINT8 fcode_tab[MAX_MV*2+1];
+#ifdef CONFIG_ENCODERS
+static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL;
+static uint8_t fcode_tab[MAX_MV*2+1];
-static inline int get_bits_diff(MpegEncContext *s){
- int bits,ret;
-
- bits= get_bit_count(&s->pb);
- ret= bits - s->last_bits;
- s->last_bits=bits;
-
- return ret;
-}
+static uint32_t uni_mpeg1_ac_vlc_bits[64*64*2];
+static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
+#endif
static void init_2d_vlc_rl(RLTable *rl)
{
}
}
+static void init_uni_ac_vlc(RLTable *rl, uint32_t *uni_ac_vlc_bits, uint8_t *uni_ac_vlc_len){
+ int i;
+
+ for(i=0; i<128; i++){
+ int level= i-64;
+ int run;
+ for(run=0; run<64; run++){
+ int len, bits, code;
+
+ int alevel= ABS(level);
+ int sign= (level>>31)&1;
+
+ if (alevel > rl->max_level[0][run])
+ code= 111; /*rl->n*/
+ else
+ code= rl->index_run[0][run] + alevel - 1;
+
+ if (code < 111 /* rl->n */) {
+ /* store the vlc & sign at once */
+ len= mpeg1_vlc[code][1]+1;
+ bits= (mpeg1_vlc[code][0]<<1) + sign;
+ } else {
+ len= mpeg1_vlc[111/*rl->n*/][1]+6;
+ bits= mpeg1_vlc[111/*rl->n*/][0]<<6;
+
+ bits|= run;
+ if (alevel < 128) {
+ bits<<=8; len+=8;
+ bits|= level & 0xff;
+ } else {
+ bits<<=16; len+=16;
+ bits|= level & 0xff;
+ if (level < 0) {
+ bits|= 0x8001 + level + 255;
+ } else {
+ bits|= level & 0xffff;
+ }
+ }
+ }
+
+ uni_ac_vlc_bits[UNI_AC_ENC_INDEX(run, i)]= bits;
+ uni_ac_vlc_len [UNI_AC_ENC_INDEX(run, i)]= len;
+ }
+ }
+}
static void put_header(MpegEncContext *s, int header)
{
{
unsigned int vbv_buffer_size;
unsigned int fps, v;
- int n;
- UINT64 time_code;
+ int n, i;
+ uint64_t time_code;
+ float best_aspect_error= 1E10;
+ float aspect_ratio= s->avctx->aspect_ratio;
- if (s->picture_in_gop_number == 0) {
+ if(aspect_ratio==0.0) aspect_ratio= s->width / (float)s->height; //pixel aspect 1:1 (VGA)
+
+ if (s->current_picture.key_frame) {
/* mpeg1 header repeated every gop */
put_header(s, SEQ_START_CODE);
int i, dmin, d;
s->frame_rate_index = 0;
dmin = 0x7fffffff;
- for(i=1;i<9;i++) {
- d = abs(s->frame_rate - frame_rate_tab[i]);
+ for(i=1;i<14;i++) {
+ if(s->avctx->strict_std_compliance >= 0 && i>=9) break;
+
+ d = abs(MPEG1_FRAME_RATE_BASE*(int64_t)s->avctx->frame_rate/s->avctx->frame_rate_base - frame_rate_tab[i]);
if (d < dmin) {
dmin = d;
s->frame_rate_index = i;
put_bits(&s->pb, 12, s->width);
put_bits(&s->pb, 12, s->height);
- put_bits(&s->pb, 4, 1); /* 1/1 aspect ratio */
+
+ for(i=1; i<15; i++){
+ float error= mpeg1_aspect[i] - s->width/(s->height*aspect_ratio);
+ error= ABS(error);
+
+ if(error < best_aspect_error){
+ best_aspect_error= error;
+ s->aspect_ratio_info= i;
+ }
+ }
+
+ put_bits(&s->pb, 4, s->aspect_ratio_info);
put_bits(&s->pb, 4, s->frame_rate_index);
- v = s->bit_rate / 400;
+ v = (s->bit_rate + 399) / 400;
if (v > 0x3ffff)
v = 0x3ffff;
put_bits(&s->pb, 18, v);
/* time code : we must convert from the real frame rate to a
fake mpeg frame rate in case of low frame rate */
fps = frame_rate_tab[s->frame_rate_index];
- time_code = (INT64)s->fake_picture_number * FRAME_RATE_BASE;
+ time_code = (int64_t)s->fake_picture_number * MPEG1_FRAME_RATE_BASE;
s->gop_picture_number = s->fake_picture_number;
- put_bits(&s->pb, 5, (UINT32)((time_code / (fps * 3600)) % 24));
- put_bits(&s->pb, 6, (UINT32)((time_code / (fps * 60)) % 60));
+ put_bits(&s->pb, 5, (uint32_t)((time_code / (fps * 3600)) % 24));
+ put_bits(&s->pb, 6, (uint32_t)((time_code / (fps * 60)) % 60));
put_bits(&s->pb, 1, 1);
- put_bits(&s->pb, 6, (UINT32)((time_code / fps) % 60));
- put_bits(&s->pb, 6, (UINT32)((time_code % fps) / FRAME_RATE_BASE));
+ put_bits(&s->pb, 6, (uint32_t)((time_code / fps) % 60));
+ put_bits(&s->pb, 6, (uint32_t)((time_code % fps) / MPEG1_FRAME_RATE_BASE));
put_bits(&s->pb, 1, 1); /* closed gop */
put_bits(&s->pb, 1, 0); /* broken link */
}
- if (s->frame_rate < (24 * FRAME_RATE_BASE) && s->picture_number > 0) {
+ if (s->avctx->frame_rate < (24 * s->avctx->frame_rate_base) && s->picture_number > 0) {
/* insert empty P pictures to slow down to the desired
frame rate. Each fake pictures takes about 20 bytes */
fps = frame_rate_tab[s->frame_rate_index];
- n = (((INT64)s->picture_number * fps) / s->frame_rate) - 1;
+ n = av_rescale((int64_t)s->picture_number * s->avctx->frame_rate_base, fps, s->avctx->frame_rate) / MPEG1_FRAME_RATE_BASE - 1;
while (s->fake_picture_number < n) {
mpeg1_skip_picture(s, s->fake_picture_number -
s->gop_picture_number);
}
}
+static inline void encode_mb_skip_run(MpegEncContext *s, int run){
+ while (run >= 33) {
+ put_bits(&s->pb, 11, 0x008);
+ run -= 33;
+ }
+ put_bits(&s->pb, mbAddrIncrTable[run][1],
+ mbAddrIncrTable[run][0]);
+}
/* insert a fake P picture */
static void mpeg1_skip_picture(MpegEncContext *s, int pict_num)
{
- unsigned int mb_incr;
-
/* mpeg1 picture header */
put_header(s, PICTURE_START_CODE);
/* temporal reference */
put_bits(&s->pb, 5, 1); /* quantizer scale */
put_bits(&s->pb, 1, 0); /* slice extra information */
- mb_incr = 1;
- put_bits(&s->pb, mbAddrIncrTable[mb_incr - 1][1],
- mbAddrIncrTable[mb_incr - 1][0]);
+ encode_mb_skip_run(s, 0);
/* empty macroblock */
put_bits(&s->pb, 3, 1); /* motion only */
put_bits(&s->pb, 1, 1);
/* output a number of empty slice */
- mb_incr = s->mb_width * s->mb_height - 1;
- while (mb_incr > 33) {
- put_bits(&s->pb, 11, 0x008);
- mb_incr -= 33;
- }
- put_bits(&s->pb, mbAddrIncrTable[mb_incr - 1][1],
- mbAddrIncrTable[mb_incr - 1][0]);
+ encode_mb_skip_run(s, s->mb_width * s->mb_height - 2);
/* empty macroblock */
put_bits(&s->pb, 3, 1); /* motion only */
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
}
+#ifdef CONFIG_ENCODERS
+
+void ff_mpeg1_encode_slice_header(MpegEncContext *s){
+ put_header(s, SLICE_MIN_START_CODE + s->mb_y);
+ put_bits(&s->pb, 5, s->qscale); /* quantizer scale */
+ put_bits(&s->pb, 1, 0); /* slice extra information */
+}
+
+void ff_mpeg1_clean_buffers(MpegEncContext *s){
+ s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
+ s->last_dc[1] = s->last_dc[0];
+ s->last_dc[2] = s->last_dc[0];
+ memset(s->last_mv, 0, sizeof(s->last_mv));
+}
+
void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
{
mpeg1_encode_sequence_header(s);
/* mpeg1 picture header */
put_header(s, PICTURE_START_CODE);
/* temporal reference */
- put_bits(&s->pb, 10, (s->fake_picture_number -
+
+ // RAL: s->picture_number instead of s->fake_picture_number
+ put_bits(&s->pb, 10, (s->picture_number -
s->gop_picture_number) & 0x3ff);
s->fake_picture_number++;
put_bits(&s->pb, 3, s->pict_type);
put_bits(&s->pb, 16, 0xffff); /* non constant bit rate */
- if (s->pict_type == P_TYPE) {
+ // RAL: Forward f_code also needed for B frames
+ if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
put_bits(&s->pb, 1, 0); /* half pel coordinates */
put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
}
+ // RAL: Backward f_code necessary for B frames
+ if (s->pict_type == B_TYPE) {
+ put_bits(&s->pb, 1, 0); /* half pel coordinates */
+ put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
+ }
+
put_bits(&s->pb, 1, 0); /* extra bit picture */
- /* only one slice */
- put_header(s, SLICE_MIN_START_CODE);
- put_bits(&s->pb, 5, s->qscale); /* quantizer scale */
- put_bits(&s->pb, 1, 0); /* slice extra information */
+ s->mb_y=0;
+ ff_mpeg1_encode_slice_header(s);
}
void mpeg1_encode_mb(MpegEncContext *s,
DCTELEM block[6][64],
int motion_x, int motion_y)
{
- int mb_incr, i, cbp, mb_x, mb_y;
-
- mb_x = s->mb_x;
- mb_y = s->mb_y;
+ int i, cbp;
+ const int mb_x = s->mb_x;
+ const int mb_y = s->mb_y;
+ const int first_mb= mb_x == s->resync_mb_x && mb_y == s->resync_mb_y;
/* compute cbp */
cbp = 0;
cbp |= 1 << (5 - i);
}
- /* skip macroblock, except if first or last macroblock of a slice */
- if ((cbp | motion_x | motion_y) == 0 &&
- (!((mb_x | mb_y) == 0 ||
- (mb_x == s->mb_width - 1 && mb_y == s->mb_height - 1)))) {
- s->mb_incr++;
+ if (cbp == 0 && !first_mb && (mb_x != s->mb_width - 1 || mb_y != s->mb_height - 1) &&
+ ((s->pict_type == P_TYPE && (motion_x | motion_y) == 0) ||
+ (s->pict_type == B_TYPE && s->mv_dir == s->last_mv_dir && (((s->mv_dir & MV_DIR_FORWARD) ? ((s->mv[0][0][0] - s->last_mv[0][0][0])|(s->mv[0][0][1] - s->last_mv[0][0][1])) : 0) |
+ ((s->mv_dir & MV_DIR_BACKWARD) ? ((s->mv[1][0][0] - s->last_mv[1][0][0])|(s->mv[1][0][1] - s->last_mv[1][0][1])) : 0)) == 0))) {
+ s->mb_skip_run++;
s->qscale -= s->dquant;
s->skip_count++;
s->misc_bits++;
s->last_bits++;
} else {
- /* output mb incr */
- mb_incr = s->mb_incr;
-
- while (mb_incr > 33) {
- put_bits(&s->pb, 11, 0x008);
- mb_incr -= 33;
+ if(first_mb){
+ assert(s->mb_skip_run == 0);
+ encode_mb_skip_run(s, s->mb_x);
+ }else{
+ encode_mb_skip_run(s, s->mb_skip_run);
}
- put_bits(&s->pb, mbAddrIncrTable[mb_incr - 1][1],
- mbAddrIncrTable[mb_incr - 1][0]);
if (s->pict_type == I_TYPE) {
if(s->dquant && cbp){
}
s->misc_bits+= get_bits_diff(s);
s->i_count++;
- } else {
- if (s->mb_intra) {
- if(s->dquant && cbp){
- put_bits(&s->pb, 6, 0x01);
- put_bits(&s->pb, 5, s->qscale);
- }else{
- put_bits(&s->pb, 5, 0x03);
- s->qscale -= s->dquant;
- }
- s->misc_bits+= get_bits_diff(s);
- s->i_count++;
- } else {
+ } else if (s->mb_intra) {
+ if(s->dquant && cbp){
+ put_bits(&s->pb, 6, 0x01);
+ put_bits(&s->pb, 5, s->qscale);
+ }else{
+ put_bits(&s->pb, 5, 0x03);
+ s->qscale -= s->dquant;
+ }
+ s->misc_bits+= get_bits_diff(s);
+ s->i_count++;
+ s->last_mv[0][0][0] =
+ s->last_mv[0][0][1] = 0;
+ } else if (s->pict_type == P_TYPE) {
if (cbp != 0) {
if (motion_x == 0 && motion_y == 0) {
if(s->dquant){
put_bits(&s->pb, 1, 1); /* motion + cbp */
}
s->misc_bits+= get_bits_diff(s);
- mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0]);
- mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1]);
+ mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
+ mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
s->mv_bits+= get_bits_diff(s);
put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
}
} else {
put_bits(&s->pb, 3, 1); /* motion only */
- mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0]);
- mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1]);
+ mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code); // RAL: f_code parameter added
+ mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code); // RAL: f_code parameter added
s->qscale -= s->dquant;
s->mv_bits+= get_bits_diff(s);
}
s->f_count++;
+ } else
+ { // RAL: All the following bloc added for B frames:
+ if (cbp != 0)
+ { // With coded bloc pattern
+ if (s->mv_dir == (MV_DIR_FORWARD | MV_DIR_BACKWARD))
+ { // Bi-directional motion
+ if (s->dquant)
+ { // With QScale
+ put_bits(&s->pb, 5, 2);
+ put_bits(&s->pb, 5, s->qscale);
+ }
+ else // Without QScale
+ put_bits(&s->pb, 2, 3);
+ s->misc_bits += get_bits_diff(s);
+ mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
+ mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
+ mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
+ mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
+ s->b_count++;
+ s->f_count++;
+ s->mv_bits += get_bits_diff(s);
+ put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
+ }
+ else if (s->mv_dir == MV_DIR_BACKWARD)
+ { // Backward motion
+ if (s->dquant)
+ { // With QScale
+ put_bits(&s->pb, 6, 2);
+ put_bits(&s->pb, 5, s->qscale);
+ }
+ else // Without QScale
+ put_bits(&s->pb, 3, 3);
+ s->misc_bits += get_bits_diff(s);
+ mpeg1_encode_motion(s, motion_x - s->last_mv[1][0][0], s->b_code);
+ mpeg1_encode_motion(s, motion_y - s->last_mv[1][0][1], s->b_code);
+ s->b_count++;
+ s->mv_bits += get_bits_diff(s);
+ put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
+ }
+ else if (s->mv_dir == MV_DIR_FORWARD)
+ { // Forward motion
+ if (s->dquant)
+ { // With QScale
+ put_bits(&s->pb, 6, 3);
+ put_bits(&s->pb, 5, s->qscale);
+ }
+ else // Without QScale
+ put_bits(&s->pb, 4, 3);
+ s->misc_bits += get_bits_diff(s);
+ mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);
+ mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);
+ s->f_count++;
+ s->mv_bits += get_bits_diff(s);
+ put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
+ }
+ }
+ else
+ { // No coded bloc pattern
+ if (s->mv_dir == (MV_DIR_FORWARD | MV_DIR_BACKWARD))
+ { // Bi-directional motion
+ put_bits(&s->pb, 2, 2); /* backward & forward motion */
+ mpeg1_encode_motion(s, s->mv[0][0][0] - s->last_mv[0][0][0], s->f_code);
+ mpeg1_encode_motion(s, s->mv[0][0][1] - s->last_mv[0][0][1], s->f_code);
+ mpeg1_encode_motion(s, s->mv[1][0][0] - s->last_mv[1][0][0], s->b_code);
+ mpeg1_encode_motion(s, s->mv[1][0][1] - s->last_mv[1][0][1], s->b_code);
+ s->b_count++;
+ s->f_count++;
+ }
+ else if (s->mv_dir == MV_DIR_BACKWARD)
+ { // Backward motion
+ put_bits(&s->pb, 3, 2); /* backward motion only */
+ mpeg1_encode_motion(s, motion_x - s->last_mv[1][0][0], s->b_code);
+ mpeg1_encode_motion(s, motion_y - s->last_mv[1][0][1], s->b_code);
+ s->b_count++;
+ }
+ else if (s->mv_dir == MV_DIR_FORWARD)
+ { // Forward motion
+ put_bits(&s->pb, 4, 2); /* forward motion only */
+ mpeg1_encode_motion(s, motion_x - s->last_mv[0][0][0], s->f_code);
+ mpeg1_encode_motion(s, motion_y - s->last_mv[0][0][1], s->f_code);
+ s->f_count++;
+ }
+ s->qscale -= s->dquant;
+ s->mv_bits += get_bits_diff(s);
+ }
+ // End of bloc from RAL
}
- }
for(i=0;i<6;i++) {
if (cbp & (1 << (5 - i))) {
mpeg1_encode_block(s, block[i], i);
}
}
- s->mb_incr = 1;
+ s->mb_skip_run = 0;
if(s->mb_intra)
s->i_tex_bits+= get_bits_diff(s);
else
s->p_tex_bits+= get_bits_diff(s);
}
- s->last_mv[0][0][0] = motion_x;
- s->last_mv[0][0][1] = motion_y;
+
+ // RAL: By this:
+ if (s->mv_dir & MV_DIR_FORWARD)
+ {
+ s->last_mv[0][0][0]= s->mv[0][0][0];
+ s->last_mv[0][0][1]= s->mv[0][0][1];
+ }
+ if (s->mv_dir & MV_DIR_BACKWARD)
+ {
+ s->last_mv[1][0][0]= s->mv[1][0][0];
+ s->last_mv[1][0][1]= s->mv[1][0][1];
+ }
}
-static void mpeg1_encode_motion(MpegEncContext *s, int val)
+// RAL: Parameter added: f_or_b_code
+static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code)
{
int code, bit_size, l, m, bits, range, sign;
mbMotionVectorTable[0][1],
mbMotionVectorTable[0][0]);
} else {
- bit_size = s->f_code - 1;
+ bit_size = f_or_b_code - 1;
range = 1 << bit_size;
/* modulo encoding */
l = 16 * range;
bits = val & (range - 1);
sign = 1;
}
+
+ assert(code > 0 && code <= 16);
+
put_bits(&s->pb,
mbMotionVectorTable[code][1],
mbMotionVectorTable[code][0]);
+
put_bits(&s->pb, 1, sign);
if (bit_size > 0) {
put_bits(&s->pb, bit_size, bits);
done=1;
init_rl(&rl_mpeg1);
-
+
for(i=0; i<64; i++)
{
mpeg1_max_level[0][i]= rl_mpeg1.max_level[0][i];
mpeg1_index_run[0][i]= rl_mpeg1.index_run[0][i];
}
+
+ init_uni_ac_vlc(&rl_mpeg1, uni_mpeg1_ac_vlc_bits, uni_mpeg1_ac_vlc_len);
/* build unified dc encoding tables */
for(i=-255; i<256; i++)
mpeg1_chr_dc_uni[i+255]= bits + (code<<8);
}
+ mv_penalty= av_mallocz( sizeof(uint8_t)*(MAX_FCODE+1)*(2*MAX_MV+1) );
+
for(f_code=1; f_code<=MAX_FCODE; f_code++){
for(mv=-MAX_MV; mv<=MAX_MV; mv++){
int len;
}
}
}
- s->mv_penalty= mv_penalty;
+ s->me.mv_penalty= mv_penalty;
s->fcode_tab= fcode_tab;
s->min_qcoeff=-255;
s->max_qcoeff= 255;
- s->intra_quant_bias= 3<<(QUANT_BIAS_SHIFT-3); //(a + x*3/8)/x
- s->inter_quant_bias= 0;
+ s->intra_ac_vlc_length=
+ s->inter_ac_vlc_length= uni_mpeg1_ac_vlc_len;
}
static inline void encode_dc(MpegEncContext *s, int diff, int component)
it is handled slightly differently */
level = block[0];
if (abs(level) == 1) {
- code = ((UINT32)level >> 31); /* the sign bit */
+ code = ((uint32_t)level >> 31); /* the sign bit */
put_bits(&s->pb, 2, code | 0x02);
i = 1;
} else {
sign&=1;
// code = get_rl_index(rl, 0, run, alevel);
- if (alevel > mpeg1_max_level[0][run])
- code= 111; /*rl->n*/
- else
+ if (alevel <= mpeg1_max_level[0][run]){
code= mpeg1_index_run[0][run] + alevel - 1;
-
- if (code < 111 /* rl->n */) {
/* store the vlc & sign at once */
put_bits(&s->pb, mpeg1_vlc[code][1]+1, (mpeg1_vlc[code][0]<<1) + sign);
} else {
/* end of block */
put_bits(&s->pb, 2, 0x2);
}
+#endif //CONFIG_ENCODERS
/******************************************/
/* decoding */
init_vlc(&mv_vlc, MV_VLC_BITS, 17,
&mbMotionVectorTable[0][1], 2, 1,
&mbMotionVectorTable[0][0], 2, 1);
- init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 35,
+ init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
&mbAddrIncrTable[0][1], 2, 1,
&mbAddrIncrTable[0][0], 2, 1);
init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 63,
&mbPatTable[0][1], 2, 1,
&mbPatTable[0][0], 2, 1);
- init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 32,
+ init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
&table_mb_ptype[0][1], 2, 1,
&table_mb_ptype[0][0], 2, 1);
- init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 32,
+ init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
&table_mb_btype[0][1], 2, 1,
&table_mb_btype[0][0], 2, 1);
init_rl(&rl_mpeg1);
static inline int get_qscale(MpegEncContext *s)
{
- int qscale;
+ int qscale = get_bits(&s->gb, 5);
if (s->mpeg2) {
if (s->q_scale_type) {
- qscale = non_linear_qscale[get_bits(&s->gb, 5)];
+ return non_linear_qscale[qscale];
} else {
- qscale = get_bits(&s->gb, 5) << 1;
+ return qscale << 1;
}
- } else {
- /* for mpeg1, we use the generic unquant code */
- qscale = get_bits(&s->gb, 5);
}
return qscale;
}
dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
- if (--s->mb_incr != 0) {
+ assert(s->mb_skiped==0);
+
+ if (s->mb_skip_run-- != 0) {
+ if(s->pict_type == I_TYPE){
+ fprintf(stderr, "skiped MB in I frame at %d %d\n", s->mb_x, s->mb_y);
+ return -1;
+ }
+
/* skip mb */
s->mb_intra = 0;
for(i=0;i<6;i++)
s->mv[0][0][0] = s->mv[0][0][1] = 0;
s->last_mv[0][0][0] = s->last_mv[0][0][1] = 0;
s->last_mv[0][1][0] = s->last_mv[0][1][1] = 0;
+ s->mb_skiped = 1;
+ s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= MB_TYPE_SKIP | MB_TYPE_L0 | MB_TYPE_16x16;
} else {
/* if B type, reuse previous vectors and directions */
s->mv[0][0][0] = s->last_mv[0][0][0];
s->mv[0][0][1] = s->last_mv[0][0][1];
s->mv[1][0][0] = s->last_mv[1][0][0];
s->mv[1][0][1] = s->last_mv[1][0][1];
+
+ s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]=
+ s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1] | MB_TYPE_SKIP;
+// assert(s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride - 1]&(MB_TYPE_16x16|MB_TYPE_16x8));
+
+ if((s->mv[0][0][0]|s->mv[0][0][1]|s->mv[1][0][0]|s->mv[1][0][1])==0)
+ s->mb_skiped = 1;
}
- s->mb_skiped = 1;
+
return 0;
}
if (get_bits1(&s->gb) == 0) {
if (get_bits1(&s->gb) == 0)
return -1;
- mb_type = MB_QUANT | MB_INTRA;
+ mb_type = MB_TYPE_QUANT | MB_TYPE_INTRA;
} else {
- mb_type = MB_INTRA;
+ mb_type = MB_TYPE_INTRA;
}
break;
case P_TYPE:
fprintf(stderr, "invalid mb type in P Frame at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
+ mb_type = ptype2mb_type[ mb_type ];
break;
case B_TYPE:
mb_type = get_vlc2(&s->gb, mb_btype_vlc.table, MB_BTYPE_VLC_BITS, 1);
fprintf(stderr, "invalid mb type in B Frame at %d %d\n", s->mb_x, s->mb_y);
return -1;
}
+ mb_type = btype2mb_type[ mb_type ];
break;
}
dprintf("mb_type=%x\n", mb_type);
- motion_type = 0; /* avoid warning */
- if (mb_type & (MB_FOR|MB_BACK)) {
- /* get additionnal motion vector type */
- if (s->picture_structure == PICT_FRAME && s->frame_pred_frame_dct)
- motion_type = MT_FRAME;
- else
- motion_type = get_bits(&s->gb, 2);
- }
- /* compute dct type */
- if (s->picture_structure == PICT_FRAME &&
- !s->frame_pred_frame_dct &&
- (mb_type & (MB_PAT | MB_INTRA))) {
- s->interlaced_dct = get_bits1(&s->gb);
-#ifdef DEBUG
- if (s->interlaced_dct)
- printf("interlaced_dct\n");
-#endif
- } else {
- s->interlaced_dct = 0; /* frame based */
- }
+// motion_type = 0; /* avoid warning */
+ if (IS_INTRA(mb_type)) {
+ /* compute dct type */
+ if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
+ !s->frame_pred_frame_dct) {
+ s->interlaced_dct = get_bits1(&s->gb);
+ }
- if (mb_type & MB_QUANT) {
- s->qscale = get_qscale(s);
- }
- if (mb_type & MB_INTRA) {
+ if (IS_QUANT(mb_type))
+ s->qscale = get_qscale(s);
+
if (s->concealment_motion_vectors) {
/* just parse them */
if (s->picture_structure != PICT_FRAME)
skip_bits1(&s->gb); /* field select */
mpeg_decode_motion(s, s->mpeg_f_code[0][0], 0);
mpeg_decode_motion(s, s->mpeg_f_code[0][1], 0);
+ skip_bits1(&s->gb); /* marker */
}
s->mb_intra = 1;
- cbp = 0x3f;
memset(s->last_mv, 0, sizeof(s->last_mv)); /* reset mv prediction */
+
+ if (s->mpeg2) {
+ for(i=0;i<6;i++) {
+ if (mpeg2_decode_block_intra(s, block[i], i) < 0)
+ return -1;
+ }
+ } else {
+ for(i=0;i<6;i++) {
+ if (mpeg1_decode_block_intra(s, block[i], i) < 0)
+ return -1;
+ }
+ }
} else {
- s->mb_intra = 0;
- cbp = 0;
- }
- /* special case of implicit zero motion vector */
- if (s->pict_type == P_TYPE && !(mb_type & MB_FOR)) {
- s->mv_dir = MV_DIR_FORWARD;
- s->mv_type = MV_TYPE_16X16;
- s->last_mv[0][0][0] = 0;
- s->last_mv[0][0][1] = 0;
- s->last_mv[0][1][0] = 0;
- s->last_mv[0][1][1] = 0;
- s->mv[0][0][0] = 0;
- s->mv[0][0][1] = 0;
- } else if (mb_type & (MB_FOR | MB_BACK)) {
- /* motion vectors */
- s->mv_dir = 0;
- for(i=0;i<2;i++) {
- if (mb_type & (MB_FOR >> i)) {
- s->mv_dir |= (MV_DIR_FORWARD >> i);
- dprintf("motion_type=%d\n", motion_type);
- switch(motion_type) {
- case MT_FRAME: /* or MT_16X8 */
- if (s->picture_structure == PICT_FRAME) {
- /* MT_FRAME */
- s->mv_type = MV_TYPE_16X16;
- for(k=0;k<2;k++) {
- val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
- s->last_mv[i][0][k]);
- s->last_mv[i][0][k] = val;
- s->last_mv[i][1][k] = val;
+ if (mb_type & MB_TYPE_ZERO_MV){
+ assert(mb_type & MB_TYPE_PAT);
+
+ /* compute dct type */
+ if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
+ !s->frame_pred_frame_dct) {
+ s->interlaced_dct = get_bits1(&s->gb);
+ }
+
+ if (IS_QUANT(mb_type))
+ s->qscale = get_qscale(s);
+
+ s->mv_dir = MV_DIR_FORWARD;
+ s->mv_type = MV_TYPE_16X16;
+ s->last_mv[0][0][0] = 0;
+ s->last_mv[0][0][1] = 0;
+ s->last_mv[0][1][0] = 0;
+ s->last_mv[0][1][1] = 0;
+ s->mv[0][0][0] = 0;
+ s->mv[0][0][1] = 0;
+ }else{
+ assert(mb_type & MB_TYPE_L0L1);
+//FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
+ /* get additionnal motion vector type */
+ if (s->frame_pred_frame_dct)
+ motion_type = MT_FRAME;
+ else{
+ motion_type = get_bits(&s->gb, 2);
+ }
+
+ /* compute dct type */
+ if (s->picture_structure == PICT_FRAME && //FIXME add a interlaced_dct coded var?
+ !s->frame_pred_frame_dct && IS_PAT(mb_type)) {
+ s->interlaced_dct = get_bits1(&s->gb);
+ }
+
+ if (IS_QUANT(mb_type))
+ s->qscale = get_qscale(s);
+
+ /* motion vectors */
+ s->mv_dir = 0;
+ for(i=0;i<2;i++) {
+ if (USES_LIST(mb_type, i)) {
+ s->mv_dir |= (MV_DIR_FORWARD >> i);
+ dprintf("motion_type=%d\n", motion_type);
+ switch(motion_type) {
+ case MT_FRAME: /* or MT_16X8 */
+ if (s->picture_structure == PICT_FRAME) {
+ /* MT_FRAME */
+ mb_type |= MB_TYPE_16x16;
+ s->mv_type = MV_TYPE_16X16;
+ s->mv[i][0][0]= s->last_mv[i][0][0]= s->last_mv[i][1][0] =
+ mpeg_decode_motion(s, s->mpeg_f_code[i][0], s->last_mv[i][0][0]);
+ s->mv[i][0][1]= s->last_mv[i][0][1]= s->last_mv[i][1][1] =
+ mpeg_decode_motion(s, s->mpeg_f_code[i][1], s->last_mv[i][0][1]);
/* full_pel: only for mpeg1 */
- if (s->full_pel[i])
- val = val << 1;
- s->mv[i][0][k] = val;
- dprintf("mv%d: %d\n", k, val);
- }
- } else {
- /* MT_16X8 */
- s->mv_type = MV_TYPE_16X8;
- for(j=0;j<2;j++) {
- s->field_select[i][j] = get_bits1(&s->gb);
- for(k=0;k<2;k++) {
- val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
- s->last_mv[i][j][k]);
- s->last_mv[i][j][k] = val;
- s->mv[i][j][k] = val;
+ if (s->full_pel[i]){
+ s->mv[i][0][0] <<= 1;
+ s->mv[i][0][1] <<= 1;
+ }
+ } else {
+ /* MT_16X8 */
+ mb_type |= MB_TYPE_16x8;
+ s->mv_type = MV_TYPE_16X8;
+ for(j=0;j<2;j++) {
+ s->field_select[i][j] = get_bits1(&s->gb);
+ for(k=0;k<2;k++) {
+ val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
+ s->last_mv[i][j][k]);
+ s->last_mv[i][j][k] = val;
+ s->mv[i][j][k] = val;
+ }
}
}
- }
- break;
- case MT_FIELD:
- if (s->picture_structure == PICT_FRAME) {
+ break;
+ case MT_FIELD:
s->mv_type = MV_TYPE_FIELD;
- for(j=0;j<2;j++) {
- s->field_select[i][j] = get_bits1(&s->gb);
- val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
- s->last_mv[i][j][0]);
- s->last_mv[i][j][0] = val;
- s->mv[i][j][0] = val;
- dprintf("fmx=%d\n", val);
- val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
- s->last_mv[i][j][1] >> 1);
- s->last_mv[i][j][1] = val << 1;
- s->mv[i][j][1] = val;
- dprintf("fmy=%d\n", val);
- }
- } else {
- s->mv_type = MV_TYPE_16X16;
- s->field_select[i][0] = get_bits1(&s->gb);
- for(k=0;k<2;k++) {
- val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
- s->last_mv[i][0][k]);
- s->last_mv[i][0][k] = val;
- s->last_mv[i][1][k] = val;
- s->mv[i][0][k] = val;
- }
- }
- break;
- case MT_DMV:
- {
- int dmx, dmy, mx, my, m;
-
- mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
- s->last_mv[i][0][0]);
- s->last_mv[i][0][0] = mx;
- s->last_mv[i][1][0] = mx;
- dmx = get_dmv(s);
- my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
- s->last_mv[i][0][1] >> 1);
- dmy = get_dmv(s);
- s->mv_type = MV_TYPE_DMV;
- /* XXX: totally broken */
if (s->picture_structure == PICT_FRAME) {
- s->last_mv[i][0][1] = my << 1;
- s->last_mv[i][1][1] = my << 1;
-
- m = s->top_field_first ? 1 : 3;
- /* top -> top pred */
- s->mv[i][0][0] = mx;
- s->mv[i][0][1] = my << 1;
- s->mv[i][1][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
- s->mv[i][1][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
- m = 4 - m;
- s->mv[i][2][0] = mx;
- s->mv[i][2][1] = my << 1;
- s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
- s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
+ mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
+ for(j=0;j<2;j++) {
+ s->field_select[i][j] = get_bits1(&s->gb);
+ val = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
+ s->last_mv[i][j][0]);
+ s->last_mv[i][j][0] = val;
+ s->mv[i][j][0] = val;
+ dprintf("fmx=%d\n", val);
+ val = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
+ s->last_mv[i][j][1] >> 1);
+ s->last_mv[i][j][1] = val << 1;
+ s->mv[i][j][1] = val;
+ dprintf("fmy=%d\n", val);
+ }
} else {
- s->last_mv[i][0][1] = my;
- s->last_mv[i][1][1] = my;
- s->mv[i][0][0] = mx;
- s->mv[i][0][1] = my;
- s->mv[i][1][0] = ((mx + (mx > 0)) >> 1) + dmx;
- s->mv[i][1][1] = ((my + (my > 0)) >> 1) + dmy - 1
- /* + 2 * cur_field */;
+ mb_type |= MB_TYPE_16x16;
+ s->field_select[i][0] = get_bits1(&s->gb);
+ for(k=0;k<2;k++) {
+ val = mpeg_decode_motion(s, s->mpeg_f_code[i][k],
+ s->last_mv[i][0][k]);
+ s->last_mv[i][0][k] = val;
+ s->last_mv[i][1][k] = val;
+ s->mv[i][0][k] = val;
+ }
}
+ break;
+ case MT_DMV:
+ {
+ int dmx, dmy, mx, my, m;
+
+ mx = mpeg_decode_motion(s, s->mpeg_f_code[i][0],
+ s->last_mv[i][0][0]);
+ s->last_mv[i][0][0] = mx;
+ s->last_mv[i][1][0] = mx;
+ dmx = get_dmv(s);
+ my = mpeg_decode_motion(s, s->mpeg_f_code[i][1],
+ s->last_mv[i][0][1] >> 1);
+ dmy = get_dmv(s);
+ s->mv_type = MV_TYPE_DMV;
+ /* XXX: totally broken */
+ if (s->picture_structure == PICT_FRAME) {
+ mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
+
+ s->last_mv[i][0][1] = my << 1;
+ s->last_mv[i][1][1] = my << 1;
+
+ m = s->top_field_first ? 1 : 3;
+ /* top -> top pred */
+ s->mv[i][0][0] = mx;
+ s->mv[i][0][1] = my << 1;
+ s->mv[i][1][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
+ s->mv[i][1][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
+ m = 4 - m;
+ s->mv[i][2][0] = mx;
+ s->mv[i][2][1] = my << 1;
+ s->mv[i][3][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
+ s->mv[i][3][1] = ((my * m + (my > 0)) >> 1) + dmy + 1;
+ } else {
+ mb_type |= MB_TYPE_16x16;
+
+ s->last_mv[i][0][1] = my;
+ s->last_mv[i][1][1] = my;
+ s->mv[i][0][0] = mx;
+ s->mv[i][0][1] = my;
+ s->mv[i][1][0] = ((mx + (mx > 0)) >> 1) + dmx;
+ s->mv[i][1][1] = ((my + (my > 0)) >> 1) + dmy - 1
+ /* + 2 * cur_field */;
+ }
+ }
+ break;
}
- break;
}
}
}
- }
-
- if ((mb_type & MB_INTRA) && s->concealment_motion_vectors) {
- skip_bits1(&s->gb); /* marker */
- }
-
- if (mb_type & MB_PAT) {
- cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
- if (cbp < 0){
- fprintf(stderr, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
- cbp++;
- }
- dprintf("cbp=%x\n", cbp);
+
+ s->mb_intra = 0;
- if (s->mpeg2) {
- if (s->mb_intra) {
- for(i=0;i<6;i++) {
- if (mpeg2_decode_block_intra(s, block[i], i) < 0)
- return -1;
+ if (IS_PAT(mb_type)) {
+ cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
+ if (cbp < 0){
+ fprintf(stderr, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
+ return -1;
}
- } else {
- for(i=0;i<6;i++) {
- if (cbp & 32) {
- if (mpeg2_decode_block_non_intra(s, block[i], i) < 0)
- return -1;
- } else {
- s->block_last_index[i] = -1;
+ cbp++;
+
+ if (s->mpeg2) {
+ for(i=0;i<6;i++) {
+ if (cbp & 32) {
+ if (mpeg2_decode_block_non_intra(s, block[i], i) < 0)
+ return -1;
+ } else {
+ s->block_last_index[i] = -1;
+ }
+ cbp+=cbp;
}
- cbp+=cbp;
- }
- }
- } else {
- if (s->mb_intra) {
- for(i=0;i<6;i++) {
- if (mpeg1_decode_block_intra(s, block[i], i) < 0)
- return -1;
- }
- }else{
- for(i=0;i<6;i++) {
- if (cbp & 32) {
- if (mpeg1_decode_block_inter(s, block[i], i) < 0)
- return -1;
- } else {
- s->block_last_index[i] = -1;
+ } else {
+ for(i=0;i<6;i++) {
+ if (cbp & 32) {
+ if (mpeg1_decode_block_inter(s, block[i], i) < 0)
+ return -1;
+ } else {
+ s->block_last_index[i] = -1;
+ }
+ cbp+=cbp;
}
- cbp+=cbp;
}
+ }else{
+ for(i=0;i<6;i++)
+ s->block_last_index[i] = -1;
}
}
+
+ s->current_picture.mb_type[ s->mb_x + s->mb_y*s->mb_stride ]= mb_type;
+
return 0;
}
/* as h263, but only 17 codes */
static int mpeg_decode_motion(MpegEncContext *s, int fcode, int pred)
{
- int code, sign, val, m, l, shift;
+ int code, sign, val, l, shift;
code = get_vlc2(&s->gb, mv_vlc.table, MV_VLC_BITS, 2);
- if (code < 0) {
- return 0xffff;
- }
if (code == 0) {
return pred;
}
+ if (code < 0) {
+ return 0xffff;
+ }
+
sign = get_bits1(&s->gb);
shift = fcode - 1;
- val = (code - 1) << shift;
- if (shift > 0)
+ val = code;
+ if (shift) {
+ val = (val - 1) << shift;
val |= get_bits(&s->gb, shift);
- val++;
+ val++;
+ }
if (sign)
val = -val;
val += pred;
/* modulo decoding */
- l = (1 << shift) * 16;
- m = 2 * l;
- if (val < -l) {
- val += m;
- } else if (val >= l) {
- val -= m;
- }
+ l = 1 << (shift+4);
+ val = ((val + l)&(l*2-1)) - l;
return val;
}
if (code == 0) {
diff = 0;
} else {
- diff = get_bits(&s->gb, code);
- if ((diff & (1 << (code - 1))) == 0)
- diff = (-1 << code) | (diff + 1);
+ diff = get_xbits(&s->gb, code);
}
return diff;
}
int level, dc, diff, i, j, run;
int component;
RLTable *rl = &rl_mpeg1;
- UINT8 * const scantable= s->intra_scantable.permutated;
- const UINT16 *quant_matrix= s->intra_matrix;
+ uint8_t * const scantable= s->intra_scantable.permutated;
+ const uint16_t *quant_matrix= s->intra_matrix;
const int qscale= s->qscale;
/* DC coef */
{
int level, i, j, run;
RLTable *rl = &rl_mpeg1;
- UINT8 * const scantable= s->intra_scantable.permutated;
- const UINT16 *quant_matrix= s->inter_matrix;
+ uint8_t * const scantable= s->intra_scantable.permutated;
+ const uint16_t *quant_matrix= s->inter_matrix;
const int qscale= s->qscale;
{
{
int level, i, j, run;
RLTable *rl = &rl_mpeg1;
- UINT8 * const scantable= s->intra_scantable.permutated;
- const UINT16 *quant_matrix;
+ uint8_t * const scantable= s->intra_scantable.permutated;
+ const uint16_t *quant_matrix;
const int qscale= s->qscale;
int mismatch;
int level, dc, diff, i, j, run;
int component;
RLTable *rl;
- UINT8 * const scantable= s->intra_scantable.permutated;
- const UINT16 *quant_matrix;
+ uint8_t * const scantable= s->intra_scantable.permutated;
+ const uint16_t *quant_matrix;
const int qscale= s->qscale;
int mismatch;
return 0;
}
-/* compressed picture size */
-#define PICTURE_BUFFER_SIZE 100000
-
typedef struct Mpeg1Context {
MpegEncContext mpeg_enc_ctx;
- UINT32 header_state;
- int start_code; /* current start code */
- UINT8 buffer[PICTURE_BUFFER_SIZE];
- UINT8 *buf_ptr;
- int buffer_size;
int mpeg_enc_ctx_allocated; /* true if decoding context allocated */
int repeat_field; /* true if we must repeat the field */
} Mpeg1Context;
common_init(&s->mpeg_enc_ctx);
init_vlcs(&s->mpeg_enc_ctx);
- s->header_state = 0xff;
s->mpeg_enc_ctx_allocated = 0;
- s->buffer_size = PICTURE_BUFFER_SIZE;
- s->start_code = -1;
- s->buf_ptr = s->buffer;
s->mpeg_enc_ctx.picture_number = 0;
s->repeat_field = 0;
s->mpeg_enc_ctx.codec_id= avctx->codec->id;
- avctx->mbskip_table= s->mpeg_enc_ctx.mbskip_table;
return 0;
}
/* return the 8 bit start code value and update the search
state. Return -1 if no start code found */
-static int find_start_code(UINT8 **pbuf_ptr, UINT8 *buf_end,
- UINT32 *header_state)
+static int find_start_code(uint8_t **pbuf_ptr, uint8_t *buf_end)
{
- UINT8 *buf_ptr;
- unsigned int state, v;
+ uint8_t *buf_ptr;
+ unsigned int state=0xFFFFFFFF, v;
int val;
- state = *header_state;
buf_ptr = *pbuf_ptr;
while (buf_ptr < buf_end) {
v = *buf_ptr++;
val = -1;
found:
*pbuf_ptr = buf_ptr;
- *header_state = state;
return val;
}
static int mpeg1_decode_picture(AVCodecContext *avctx,
- UINT8 *buf, int buf_size)
+ uint8_t *buf, int buf_size)
{
Mpeg1Context *s1 = avctx->priv_data;
MpegEncContext *s = &s1->mpeg_enc_ctx;
int ref, f_code;
- init_get_bits(&s->gb, buf, buf_size);
+ init_get_bits(&s->gb, buf, buf_size*8);
ref = get_bits(&s->gb, 10); /* temporal ref */
s->pict_type = get_bits(&s->gb, 3);
dprintf("pict_type=%d number=%d\n", s->pict_type, s->picture_number);
+
skip_bits(&s->gb, 16);
if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
s->full_pel[0] = get_bits1(&s->gb);
s->mpeg_f_code[1][0] = f_code;
s->mpeg_f_code[1][1] = f_code;
}
+ s->current_picture.pict_type= s->pict_type;
+ s->current_picture.key_frame= s->pict_type == I_TYPE;
+
s->y_dc_scale = 8;
s->c_dc_scale = 8;
s->first_slice = 1;
static void mpeg_decode_sequence_extension(MpegEncContext *s)
{
int horiz_size_ext, vert_size_ext;
- int bit_rate_ext, vbv_buf_ext, low_delay;
+ int bit_rate_ext, vbv_buf_ext;
int frame_rate_ext_n, frame_rate_ext_d;
+ float aspect;
skip_bits(&s->gb, 8); /* profil and level */
s->progressive_sequence = get_bits1(&s->gb); /* progressive_sequence */
s->bit_rate = ((s->bit_rate / 400) | (bit_rate_ext << 12)) * 400;
skip_bits1(&s->gb); /* marker */
vbv_buf_ext = get_bits(&s->gb, 8);
- low_delay = get_bits1(&s->gb);
+ s->low_delay = get_bits1(&s->gb);
frame_rate_ext_n = get_bits(&s->gb, 2);
frame_rate_ext_d = get_bits(&s->gb, 5);
- if (frame_rate_ext_d >= 1)
- s->frame_rate = (s->frame_rate * frame_rate_ext_n) / frame_rate_ext_d;
+ av_reduce(
+ &s->avctx->frame_rate,
+ &s->avctx->frame_rate_base,
+ frame_rate_tab[s->frame_rate_index] * (frame_rate_ext_n+1),
+ MPEG1_FRAME_RATE_BASE * (frame_rate_ext_d+1),
+ 1<<30);
+
dprintf("sequence extension\n");
s->mpeg2 = 1;
s->avctx->sub_id = 2; /* indicates mpeg2 found */
+
+ aspect= mpeg2_aspect[s->aspect_ratio_info];
+ if(aspect>0.0) s->avctx->aspect_ratio= s->width/(aspect*s->height);
+ else if(aspect<0.0) s->avctx->aspect_ratio= -1.0/aspect;
}
static void mpeg_decode_quant_matrix_extension(MpegEncContext *s)
if (get_bits1(&s->gb)) {
for(i=0;i<64;i++) {
v = get_bits(&s->gb, 8);
- j= s->idct_permutation[ ff_zigzag_direct[i] ];
+ j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
s->intra_matrix[j] = v;
s->chroma_intra_matrix[j] = v;
}
if (get_bits1(&s->gb)) {
for(i=0;i<64;i++) {
v = get_bits(&s->gb, 8);
- j= s->idct_permutation[ ff_zigzag_direct[i] ];
+ j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
s->inter_matrix[j] = v;
s->chroma_inter_matrix[j] = v;
}
if (get_bits1(&s->gb)) {
for(i=0;i<64;i++) {
v = get_bits(&s->gb, 8);
- j= s->idct_permutation[ ff_zigzag_direct[i] ];
+ j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
s->chroma_intra_matrix[j] = v;
}
}
if (get_bits1(&s->gb)) {
for(i=0;i<64;i++) {
v = get_bits(&s->gb, 8);
- j= s->idct_permutation[ ff_zigzag_direct[i] ];
+ j= s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
s->chroma_inter_matrix[j] = v;
}
}
s->chroma_420_type = get_bits1(&s->gb);
s->progressive_frame = get_bits1(&s->gb);
+ if(s->picture_structure == PICT_FRAME)
+ s->first_field=0;
+ else{
+ s->first_field ^= 1;
+ memset(s->mbskip_table, 0, s->mb_stride*s->mb_height);
+ }
+
if(s->alternate_scan){
- ff_init_scantable(s, &s->inter_scantable , ff_alternate_vertical_scan);
- ff_init_scantable(s, &s->intra_scantable , ff_alternate_vertical_scan);
- ff_init_scantable(s, &s->intra_h_scantable, ff_alternate_vertical_scan);
- ff_init_scantable(s, &s->intra_v_scantable, ff_alternate_vertical_scan);
+ ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_alternate_vertical_scan);
+ ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_alternate_vertical_scan);
+ ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_vertical_scan);
+ ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
}else{
- ff_init_scantable(s, &s->inter_scantable , ff_zigzag_direct);
- ff_init_scantable(s, &s->intra_scantable , ff_zigzag_direct);
- ff_init_scantable(s, &s->intra_h_scantable, ff_alternate_horizontal_scan);
- ff_init_scantable(s, &s->intra_v_scantable, ff_alternate_vertical_scan);
+ ff_init_scantable(s->dsp.idct_permutation, &s->inter_scantable , ff_zigzag_direct);
+ ff_init_scantable(s->dsp.idct_permutation, &s->intra_scantable , ff_zigzag_direct);
+ ff_init_scantable(s->dsp.idct_permutation, &s->intra_h_scantable, ff_alternate_horizontal_scan);
+ ff_init_scantable(s->dsp.idct_permutation, &s->intra_v_scantable, ff_alternate_vertical_scan);
}
/* composite display not parsed */
}
static void mpeg_decode_extension(AVCodecContext *avctx,
- UINT8 *buf, int buf_size)
+ uint8_t *buf, int buf_size)
{
Mpeg1Context *s1 = avctx->priv_data;
MpegEncContext *s = &s1->mpeg_enc_ctx;
int ext_type;
- init_get_bits(&s->gb, buf, buf_size);
+ init_get_bits(&s->gb, buf, buf_size*8);
ext_type = get_bits(&s->gb, 4);
switch(ext_type) {
#define DECODE_SLICE_FATAL_ERROR -2
#define DECODE_SLICE_ERROR -1
#define DECODE_SLICE_OK 0
-#define DECODE_SLICE_EOP 1
/**
* decodes a slice.
* @return DECODE_SLICE_FATAL_ERROR if a non recoverable error occured<br>
* DECODE_SLICE_ERROR if the slice is damaged<br>
* DECODE_SLICE_OK if this slice is ok<br>
- * DECODE_SLICE_EOP if the end of the picture is reached
*/
static int mpeg_decode_slice(AVCodecContext *avctx,
- AVPicture *pict,
+ AVFrame *pict,
int start_code,
- UINT8 *buf, int buf_size)
+ uint8_t **buf, int buf_size)
{
Mpeg1Context *s1 = avctx->priv_data;
MpegEncContext *s = &s1->mpeg_enc_ctx;
int ret;
+ const int field_pic= s->picture_structure != PICT_FRAME;
+ s->resync_mb_x= s->mb_x =
+ s->resync_mb_y= s->mb_y = -1;
+
start_code = (start_code - 1) & 0xff;
if (start_code >= s->mb_height){
fprintf(stderr, "slice below image (%d >= %d)\n", start_code, s->mb_height);
- return DECODE_SLICE_ERROR;
+ return -1;
}
- s->last_dc[0] = 1 << (7 + s->intra_dc_precision);
- s->last_dc[1] = s->last_dc[0];
- s->last_dc[2] = s->last_dc[0];
- memset(s->last_mv, 0, sizeof(s->last_mv));
+
+ ff_mpeg1_clean_buffers(s);
+ s->interlaced_dct = 0;
+
/* start frame decoding */
if (s->first_slice) {
- s->first_slice = 0;
+ if(s->first_field || s->picture_structure==PICT_FRAME){
if(MPV_frame_start(s, avctx) < 0)
return DECODE_SLICE_FATAL_ERROR;
+
+ ff_er_frame_start(s);
+
+ /* first check if we must repeat the frame */
+ s->current_picture.repeat_pict = 0;
+
+ if (s->repeat_first_field) {
+ if (s->progressive_sequence) {
+ if (s->top_field_first)
+ s->current_picture.repeat_pict = 4;
+ else
+ s->current_picture.repeat_pict = 2;
+ } else if (s->progressive_frame) {
+ s->current_picture.repeat_pict = 1;
+ }
+ }
+// printf("%d \n", s->current_picture.repeat_pict);
+
+ if(s->avctx->debug&FF_DEBUG_PICT_INFO){
+ printf("qp:%d fc:%2d%2d%2d%2d %s %s %s %s dc:%d pstruct:%d fdct:%d cmv:%d qtype:%d ivlc:%d rff:%d %s\n",
+ s->qscale, s->mpeg_f_code[0][0],s->mpeg_f_code[0][1],s->mpeg_f_code[1][0],s->mpeg_f_code[1][1],
+ s->pict_type == I_TYPE ? "I" : (s->pict_type == P_TYPE ? "P" : (s->pict_type == B_TYPE ? "B" : "S")),
+ s->progressive_sequence ? "pro" :"", s->alternate_scan ? "alt" :"", s->top_field_first ? "top" :"",
+ s->intra_dc_precision, s->picture_structure, s->frame_pred_frame_dct, s->concealment_motion_vectors,
+ s->q_scale_type, s->intra_vlc_format, s->repeat_first_field, s->chroma_420_type ? "420" :"");
+ }
+ }else{ //second field
+ int i;
+
+ if(!s->current_picture_ptr){
+ fprintf(stderr, "first field missing\n");
+ return -1;
+ }
+
+ for(i=0; i<4; i++){
+ s->current_picture.data[i] = s->current_picture_ptr->data[i];
+ if(s->picture_structure == PICT_BOTTOM_FIELD){
+ s->current_picture.data[i] += s->current_picture_ptr->linesize[i];
+ }
+ }
+ }
}
+ s->first_slice = 0;
- init_get_bits(&s->gb, buf, buf_size);
+ init_get_bits(&s->gb, *buf, buf_size*8);
s->qscale = get_qscale(s);
+ if(s->qscale == 0){
+ fprintf(stderr, "qscale == 0\n");
+ return -1;
+ }
+
/* extra slice info */
while (get_bits1(&s->gb) != 0) {
skip_bits(&s->gb, 8);
}
-
+
s->mb_x=0;
+
for(;;) {
int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
- if (code < 0)
- return -1; /* error = end of slice, but empty slice is bad or?*/
+ if (code < 0){
+ fprintf(stderr, "first mb_incr damaged\n");
+ return -1;
+ }
if (code >= 33) {
if (code == 33) {
s->mb_x += 33;
break;
}
}
- s->mb_y = start_code;
- s->mb_incr= 1;
+
+ s->resync_mb_x= s->mb_x;
+ s->resync_mb_y= s->mb_y = start_code;
+ s->mb_skip_run= 0;
for(;;) {
- clear_blocks(s->block[0]);
-
+ s->dsp.clear_blocks(s->block[0]);
+
ret = mpeg_decode_mb(s, s->block);
+
dprintf("ret=%d\n", ret);
if (ret < 0)
return -1;
-
+
+ if(s->motion_val && s->pict_type != B_TYPE){ //note motion_val is normally NULL unless we want to extract the MVs
+ const int wrap = s->block_wrap[0];
+ const int xy = s->mb_x*2 + 1 + (s->mb_y*2 +1)*wrap;
+ int motion_x, motion_y;
+
+ if (s->mb_intra) {
+ motion_x = motion_y = 0;
+ }else if (s->mv_type == MV_TYPE_16X16) {
+ motion_x = s->mv[0][0][0];
+ motion_y = s->mv[0][0][1];
+ } else /*if (s->mv_type == MV_TYPE_FIELD)*/ {
+ motion_x = s->mv[0][0][0] + s->mv[0][1][0];
+ motion_y = s->mv[0][0][1] + s->mv[0][1][1];
+ motion_x = (motion_x>>1) | (motion_x&1);
+ }
+ s->motion_val[xy][0] = motion_x;
+ s->motion_val[xy][1] = motion_y;
+ s->motion_val[xy + 1][0] = motion_x;
+ s->motion_val[xy + 1][1] = motion_y;
+ s->motion_val[xy + wrap][0] = motion_x;
+ s->motion_val[xy + wrap][1] = motion_y;
+ s->motion_val[xy + 1 + wrap][0] = motion_x;
+ s->motion_val[xy + 1 + wrap][1] = motion_y;
+ }
+
MPV_decode_mb(s, s->block);
if (++s->mb_x >= s->mb_width) {
- ff_draw_horiz_band(s);
+ if(s->picture_structure==PICT_FRAME){
+ ff_draw_horiz_band(s, 16*s->mb_y, 16);
+ }else{
+ if(!s->first_field){
+ ff_draw_horiz_band(s, 32*s->mb_y, 32);
+ }
+ }
s->mb_x = 0;
s->mb_y++;
- PRINT_QP("%s", "\n");
+
+ if(s->mb_y<<field_pic >= s->mb_height){
+ int left= s->gb.size_in_bits - get_bits_count(&s->gb);
+
+ if(left < 0 || (left && show_bits(&s->gb, FFMIN(left, 23)))
+ || (avctx->error_resilience >= FF_ER_AGGRESSIVE && left>8)){
+ fprintf(stderr, "end missmatch left=%d\n", left);
+ return -1;
+ }else
+ goto eos;
+ }
}
- PRINT_QP("%2d", s->qscale);
/* skip mb handling */
- if (s->mb_incr == 0) {
+ if (s->mb_skip_run == -1) {
/* read again increment */
- s->mb_incr = 1;
+ s->mb_skip_run = 0;
for(;;) {
int code = get_vlc2(&s->gb, mbincr_vlc.table, MBINCR_VLC_BITS, 2);
- if (code < 0)
- goto eos; /* error = end of slice */
+ if (code < 0){
+ fprintf(stderr, "mb incr damaged\n");
+ return -1;
+ }
if (code >= 33) {
if (code == 33) {
- s->mb_incr += 33;
+ s->mb_skip_run += 33;
+ }else if(code == 35){
+ if(s->mb_skip_run != 0 || show_bits(&s->gb, 15) != 0){
+ fprintf(stderr, "slice missmatch\n");
+ return -1;
+ }
+ goto eos; /* end of slice */
}
/* otherwise, stuffing, nothing to do */
} else {
- s->mb_incr += code;
+ s->mb_skip_run += code;
break;
}
}
}
- if(s->mb_y >= s->mb_height){
- fprintf(stderr, "slice too long\n");
- return DECODE_SLICE_ERROR;
- }
}
-eos: //end of slice
-
- emms_c();
+eos: // end of slice
+ *buf += get_bits_count(&s->gb)/8 - 1;
+//printf("y %d %d %d %d\n", s->resync_mb_x, s->resync_mb_y, s->mb_x, s->mb_y);
+ return 0;
+}
+
+/**
+ * handles slice ends.
+ * @return 1 if it seems to be the last slice of
+ */
+static int slice_end(AVCodecContext *avctx, AVFrame *pict)
+{
+ Mpeg1Context *s1 = avctx->priv_data;
+ MpegEncContext *s = &s1->mpeg_enc_ctx;
+
+ if (!s1->mpeg_enc_ctx_allocated)
+ return 0;
/* end of slice reached */
- if (/*s->mb_x == 0 &&*/
- s->mb_y == s->mb_height) {
+ if (/*s->mb_y<<field_pic == s->mb_height &&*/ !s->first_field) {
/* end of image */
- UINT8 **picture;
+
+ if(s->mpeg2){
+ s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG2;
+ }else
+ s->current_picture_ptr->qscale_type= FF_QSCALE_TYPE_MPEG1;
+
+ ff_er_frame_end(s);
MPV_frame_end(s);
- /* XXX: incorrect reported qscale for mpeg2 */
- if (s->pict_type == B_TYPE) {
- picture = s->current_picture;
- avctx->quality = s->qscale;
+ if (s->pict_type == B_TYPE || s->low_delay) {
+ *pict= *(AVFrame*)&s->current_picture;
+ ff_print_debug_info(s, s->current_picture_ptr);
} else {
+ s->picture_number++;
/* latency of 1 frame for I and P frames */
/* XXX: use another variable than picture_number */
- if (s->picture_number == 0) {
- picture = NULL;
- } else {
- picture = s->last_picture;
- avctx->quality = s->last_qscale;
+ if (s->last_picture_ptr != NULL) {
+ *pict= *(AVFrame*)&s->last_picture;
+ ff_print_debug_info(s, s->last_picture_ptr);
}
- s->last_qscale = s->qscale;
- s->picture_number++;
- }
- if (picture) {
- pict->data[0] = picture[0];
- pict->data[1] = picture[1];
- pict->data[2] = picture[2];
- pict->linesize[0] = s->linesize;
- pict->linesize[1] = s->uvlinesize;
- pict->linesize[2] = s->uvlinesize;
- return DECODE_SLICE_EOP;
- } else {
- return DECODE_SLICE_OK;
}
+ return 1;
} else {
- return DECODE_SLICE_OK;
+ return 0;
}
}
static int mpeg1_decode_sequence(AVCodecContext *avctx,
- UINT8 *buf, int buf_size)
+ uint8_t *buf, int buf_size)
{
Mpeg1Context *s1 = avctx->priv_data;
MpegEncContext *s = &s1->mpeg_enc_ctx;
int width, height, i, v, j;
+ float aspect;
- init_get_bits(&s->gb, buf, buf_size);
+ init_get_bits(&s->gb, buf, buf_size*8);
width = get_bits(&s->gb, 12);
height = get_bits(&s->gb, 12);
- skip_bits(&s->gb, 4);
+ s->aspect_ratio_info= get_bits(&s->gb, 4);
+ if(!s->mpeg2){
+ aspect= mpeg1_aspect[s->aspect_ratio_info];
+ if(aspect!=0.0) avctx->aspect_ratio= width/(aspect*height);
+ }
+
s->frame_rate_index = get_bits(&s->gb, 4);
if (s->frame_rate_index == 0)
return -1;
}
s->width = width;
s->height = height;
- avctx->has_b_frames= s->has_b_frames = 1;
+ avctx->has_b_frames= 1;
s->avctx = avctx;
avctx->width = width;
avctx->height = height;
- if (s->frame_rate_index >= 9) {
- /* at least give a valid frame rate (some old mpeg1 have this) */
- avctx->frame_rate = 25 * FRAME_RATE_BASE;
- } else {
- avctx->frame_rate = frame_rate_tab[s->frame_rate_index];
- }
- s->frame_rate = avctx->frame_rate;
+ av_reduce(
+ &avctx->frame_rate,
+ &avctx->frame_rate_base,
+ frame_rate_tab[s->frame_rate_index],
+ MPEG1_FRAME_RATE_BASE, //FIXME store in allready reduced form
+ 1<<30
+ );
avctx->bit_rate = s->bit_rate;
if (MPV_common_init(s) < 0)
#endif
} else {
for(i=0;i<64;i++) {
- int j= s->idct_permutation[i];
+ int j= s->dsp.idct_permutation[i];
v = ff_mpeg1_default_intra_matrix[i];
s->intra_matrix[j] = v;
s->chroma_intra_matrix[j] = v;
#endif
} else {
for(i=0;i<64;i++) {
- int j= s->idct_permutation[i];
+ int j= s->dsp.idct_permutation[i];
v = ff_mpeg1_default_non_intra_matrix[i];
s->inter_matrix[j] = v;
s->chroma_inter_matrix[j] = v;
return 0;
}
+static void mpeg_decode_user_data(AVCodecContext *avctx,
+ const uint8_t *buf, int buf_size)
+{
+ const uint8_t *p;
+ int len, flags;
+ p = buf;
+ len = buf_size;
+
+ /* we parse the DTG active format information */
+ if (len >= 5 &&
+ p[0] == 'D' && p[1] == 'T' && p[2] == 'G' && p[3] == '1') {
+ flags = p[4];
+ p += 5;
+ len -= 5;
+ if (flags & 0x80) {
+ /* skip event id */
+ if (len < 2)
+ return;
+ p += 2;
+ len -= 2;
+ }
+ if (flags & 0x40) {
+ if (len < 1)
+ return;
+ avctx->dtg_active_format = p[0] & 0x0f;
+ }
+ }
+}
+
+/**
+ * finds the end of the current frame in the bitstream.
+ * @return the position of the first byte of the next frame, or -1
+ */
+static int mpeg1_find_frame_end(MpegEncContext *s, uint8_t *buf, int buf_size){
+ ParseContext *pc= &s->parse_context;
+ int i;
+ uint32_t state;
+
+ state= pc->state;
+
+ i=0;
+ if(!pc->frame_start_found){
+ for(i=0; i<buf_size; i++){
+ state= (state<<8) | buf[i];
+ if(state >= SLICE_MIN_START_CODE && state <= SLICE_MAX_START_CODE){
+ i++;
+ pc->frame_start_found=1;
+ break;
+ }
+ }
+ }
+
+ if(pc->frame_start_found){
+ for(; i<buf_size; i++){
+ state= (state<<8) | buf[i];
+ if((state&0xFFFFFF00) == 0x100){
+ if(state < SLICE_MIN_START_CODE || state > SLICE_MAX_START_CODE){
+ pc->frame_start_found=0;
+ pc->state=-1;
+ return i-3;
+ }
+ }
+ }
+ }
+ pc->state= state;
+ return END_NOT_FOUND;
+}
+
/* handle buffering and image synchronisation */
static int mpeg_decode_frame(AVCodecContext *avctx,
void *data, int *data_size,
- UINT8 *buf, int buf_size)
+ uint8_t *buf, int buf_size)
{
Mpeg1Context *s = avctx->priv_data;
- UINT8 *buf_end, *buf_ptr, *buf_start;
- int len, start_code_found, ret, code, start_code, input_size;
- AVPicture *picture = data;
+ uint8_t *buf_end, *buf_ptr;
+ int ret, start_code, input_size;
+ AVFrame *picture = data;
MpegEncContext *s2 = &s->mpeg_enc_ctx;
-
dprintf("fill_buffer\n");
*data_size = 0;
/* special case for last picture */
if (buf_size == 0) {
if (s2->picture_number > 0) {
- picture->data[0] = s2->next_picture[0];
- picture->data[1] = s2->next_picture[1];
- picture->data[2] = s2->next_picture[2];
- picture->linesize[0] = s2->linesize;
- picture->linesize[1] = s2->uvlinesize;
- picture->linesize[2] = s2->uvlinesize;
- *data_size = sizeof(AVPicture);
+ *picture= *(AVFrame*)&s2->next_picture;
+
+ *data_size = sizeof(AVFrame);
}
return 0;
}
+ if(s2->flags&CODEC_FLAG_TRUNCATED){
+ int next= mpeg1_find_frame_end(s2, buf, buf_size);
+
+ if( ff_combine_frame(s2, next, &buf, &buf_size) < 0 )
+ return buf_size;
+ }
+
buf_ptr = buf;
buf_end = buf + buf_size;
}
}
#endif
- while (buf_ptr < buf_end) {
- buf_start = buf_ptr;
+ for(;;) {
/* find start next code */
- code = find_start_code(&buf_ptr, buf_end, &s->header_state);
- if (code >= 0) {
- start_code_found = 1;
- } else {
- start_code_found = 0;
- }
- /* copy to buffer */
- len = buf_ptr - buf_start;
- if (len + (s->buf_ptr - s->buffer) > s->buffer_size) {
- /* data too big : flush */
- s->buf_ptr = s->buffer;
- if (start_code_found)
- s->start_code = code;
- } else {
- memcpy(s->buf_ptr, buf_start, len);
- s->buf_ptr += len;
- if( (!(s2->flags&CODEC_FLAG_TRUNCATED)) && (!start_code_found)
- && s->buf_ptr+4<s->buffer+s->buffer_size){
- start_code_found= 1;
- code= 0x1FF;
- s->header_state=0xFF;
- s->buf_ptr[0]=0;
- s->buf_ptr[1]=0;
- s->buf_ptr[2]=1;
- s->buf_ptr[3]=0xFF;
- s->buf_ptr+=4;
+ start_code = find_start_code(&buf_ptr, buf_end);
+ if (start_code < 0){
+ if (slice_end(avctx, picture)) {
+ if(s2->last_picture_ptr) //FIXME merge with the stuff in mpeg_decode_slice
+ *data_size = sizeof(AVPicture);
}
- if (start_code_found) {
+ return FFMAX(0, buf_ptr - buf - s2->parse_context.last_index);
+ }
+
+ input_size = buf_end - buf_ptr;
+
+ if(avctx->debug & FF_DEBUG_STARTCODE){
+ printf("%3X at %d left %d\n", start_code, buf_ptr-buf, input_size);
+ }
+
/* prepare data for next start code */
- input_size = s->buf_ptr - s->buffer;
- start_code = s->start_code;
- s->buf_ptr = s->buffer;
- s->start_code = code;
switch(start_code) {
case SEQ_START_CODE:
- mpeg1_decode_sequence(avctx, s->buffer,
+ mpeg1_decode_sequence(avctx, buf_ptr,
input_size);
break;
case PICTURE_START_CODE:
/* we have a complete image : we try to decompress it */
mpeg1_decode_picture(avctx,
- s->buffer, input_size);
+ buf_ptr, input_size);
break;
case EXT_START_CODE:
mpeg_decode_extension(avctx,
- s->buffer, input_size);
+ buf_ptr, input_size);
+ break;
+ case USER_START_CODE:
+ mpeg_decode_user_data(avctx,
+ buf_ptr, input_size);
break;
default:
if (start_code >= SLICE_MIN_START_CODE &&
start_code <= SLICE_MAX_START_CODE) {
+
+ /* skip b frames if we dont have reference frames */
+ if(s2->last_picture_ptr==NULL && s2->pict_type==B_TYPE) break;
+ /* skip b frames if we are in a hurry */
+ if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
+ /* skip everything if we are in a hurry>=5 */
+ if(avctx->hurry_up>=5) break;
+
+ if (!s->mpeg_enc_ctx_allocated) break;
+
ret = mpeg_decode_slice(avctx, picture,
- start_code, s->buffer, input_size);
- if (ret == DECODE_SLICE_EOP) {
- /* got a picture: exit */
- /* first check if we must repeat the frame */
- avctx->repeat_pict = 0;
-#if 0
- if (s2->progressive_frame && s2->repeat_first_field) {
- //fprintf(stderr,"\nRepeat this frame: %d! pict: %d",avctx->frame_number,s2->picture_number);
- //s2->repeat_first_field = 0;
- //s2->progressive_frame = 0;
- if (++s->repeat_field > 2)
- s->repeat_field = 0;
- avctx->repeat_pict = 1;
- }
-#endif
- if (s2->repeat_first_field) {
- if (s2->progressive_sequence) {
- if (s2->top_field_first)
- avctx->repeat_pict = 4;
- else
- avctx->repeat_pict = 2;
- } else if (s2->progressive_frame) {
- avctx->repeat_pict = 1;
- }
- }
- *data_size = sizeof(AVPicture);
- goto the_end;
- }else if(ret<0){
- printf("Error while decoding slice\n");
- if(ret==DECODE_SLICE_FATAL_ERROR) return -1;
+ start_code, &buf_ptr, input_size);
+ emms_c();
+
+ if(ret < 0){
+ if(s2->resync_mb_x>=0 && s2->resync_mb_y>=0)
+ ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x, s2->mb_y, AC_ERROR|DC_ERROR|MV_ERROR);
+ if(ret==DECODE_SLICE_FATAL_ERROR) return -1;
+ }else{
+ ff_er_add_slice(s2, s2->resync_mb_x, s2->resync_mb_y, s2->mb_x-1, s2->mb_y, AC_END|DC_END|MV_END);
}
}
break;
}
- }
- }
}
- the_end:
- return buf_ptr - buf;
}
static int mpeg_decode_end(AVCodecContext *avctx)