/*
- * MPEG1 codec / MPEG2 decoder
+ * MPEG1/2 decoder
* Copyright (c) 2000,2001 Fabrice Bellard.
* Copyright (c) 2002-2004 Michael Niedermayer <michaelni@gmx.at>
*
/**
* @file mpeg12.c
- * MPEG1/2 codec
+ * MPEG1/2 decoder
*/
//#define DEBUG
#include "dsputil.h"
#include "mpegvideo.h"
+#include "mpeg12.h"
#include "mpeg12data.h"
+#include "mpeg12decdata.h"
+#include "bytestream.h"
//#undef NDEBUG
//#include <assert.h>
-/* Start codes. */
-#define SEQ_END_CODE 0x000001b7
-#define SEQ_START_CODE 0x000001b3
-#define GOP_START_CODE 0x000001b8
-#define PICTURE_START_CODE 0x00000100
-#define SLICE_MIN_START_CODE 0x00000101
-#define SLICE_MAX_START_CODE 0x000001af
-#define EXT_START_CODE 0x000001b5
-#define USER_START_CODE 0x000001b2
-
#define DC_VLC_BITS 9
#define MV_VLC_BITS 9
#define MBINCR_VLC_BITS 9
#define MB_BTYPE_VLC_BITS 6
#define TEX_VLC_BITS 9
-#ifdef CONFIG_ENCODERS
-static void mpeg1_encode_block(MpegEncContext *s,
- DCTELEM *block,
- int component);
-static void mpeg1_encode_motion(MpegEncContext *s, int val, int f_or_b_code); // RAL: f_code parameter added
-#endif //CONFIG_ENCODERS
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 void exchange_uv(MpegEncContext *s);
-#ifdef HAVE_XVMC
extern int XVMC_field_start(MpegEncContext *s, AVCodecContext *avctx);
extern int XVMC_field_end(MpegEncContext *s);
extern void XVMC_pack_pblocks(MpegEncContext *s,int cbp);
extern void XVMC_init_block(MpegEncContext *s);//set s->block
-#endif
static const enum PixelFormat pixfmt_yuv_420[]= {PIX_FMT_YUV420P,-1};
static const enum PixelFormat pixfmt_yuv_422[]= {PIX_FMT_YUV422P,-1};
PIX_FMT_XVMC_MPEG2_IDCT,
PIX_FMT_XVMC_MPEG2_MC,
-1};
-#ifdef CONFIG_ENCODERS
-static uint8_t (*mv_penalty)[MAX_MV*2+1]= NULL;
-static uint8_t fcode_tab[MAX_MV*2+1];
-
-static uint8_t uni_mpeg1_ac_vlc_len [64*64*2];
-static uint8_t uni_mpeg2_ac_vlc_len [64*64*2];
-/* simple include everything table for dc, first byte is bits number next 3 are code*/
-static uint32_t mpeg1_lum_dc_uni[512];
-static uint32_t mpeg1_chr_dc_uni[512];
-
-static uint8_t mpeg1_index_run[2][64];
-static int8_t mpeg1_max_level[2][64];
-#endif //CONFIG_ENCODERS
+uint8_t ff_mpeg12_static_rl_table_store[2][2][2*MAX_RUN + MAX_LEVEL + 3];
static void init_2d_vlc_rl(RLTable *rl, int use_static)
{
}
}
-#ifdef CONFIG_ENCODERS
-static void init_uni_ac_vlc(RLTable *rl, 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= FFABS(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= rl->table_vlc[code][1]+1;
- bits= (rl->table_vlc[code][0]<<1) + sign;
- } else {
- len= rl->table_vlc[111/*rl->n*/][1]+6;
- bits= rl->table_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_len [UNI_AC_ENC_INDEX(run, i)]= len;
- }
- }
-}
-
-
-static int find_frame_rate_index(MpegEncContext *s){
- int i;
- int64_t dmin= INT64_MAX;
- int64_t d;
-
- for(i=1;i<14;i++) {
- int64_t n0= 1001LL/ff_frame_rate_tab[i].den*ff_frame_rate_tab[i].num*s->avctx->time_base.num;
- int64_t n1= 1001LL*s->avctx->time_base.den;
- if(s->avctx->strict_std_compliance > FF_COMPLIANCE_INOFFICIAL && i>=9) break;
-
- d = FFABS(n0 - n1);
- if(d < dmin){
- dmin=d;
- s->frame_rate_index= i;
- }
- }
- if(dmin)
- return -1;
- else
- return 0;
-}
-
-static int encode_init(AVCodecContext *avctx)
-{
- MpegEncContext *s = avctx->priv_data;
-
- if(MPV_encode_init(avctx) < 0)
- return -1;
-
- if(find_frame_rate_index(s) < 0){
- if(s->strict_std_compliance > FF_COMPLIANCE_EXPERIMENTAL){
- av_log(avctx, AV_LOG_ERROR, "MPEG1/2 does not support %d/%d fps\n", avctx->time_base.den, avctx->time_base.num);
- return -1;
- }else{
- av_log(avctx, AV_LOG_INFO, "MPEG1/2 does not support %d/%d fps, there may be AV sync issues\n", avctx->time_base.den, avctx->time_base.num);
- }
- }
-
- if(avctx->profile == FF_PROFILE_UNKNOWN){
- if(avctx->level != FF_LEVEL_UNKNOWN){
- av_log(avctx, AV_LOG_ERROR, "Set profile and level\n");
- return -1;
- }
- avctx->profile = s->chroma_format == CHROMA_420 ? 4 : 0; /* Main or 4:2:2 */
- }
-
- if(avctx->level == FF_LEVEL_UNKNOWN){
- if(avctx->profile == 0){ /* 4:2:2 */
- if(avctx->width <= 720 && avctx->height <= 608) avctx->level = 5; /* Main */
- else avctx->level = 2; /* High */
- }else{
- if(avctx->profile != 1 && s->chroma_format != CHROMA_420){
- av_log(avctx, AV_LOG_ERROR, "Only High(1) and 4:2:2(0) profiles support 4:2:2 color sampling\n");
- return -1;
- }
- if(avctx->width <= 720 && avctx->height <= 576) avctx->level = 8; /* Main */
- else if(avctx->width <= 1440) avctx->level = 6; /* High 1440 */
- else avctx->level = 4; /* High */
- }
- }
-
- if((avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) && s->frame_rate_index != 4){
- av_log(avctx, AV_LOG_ERROR, "Drop frame time code only allowed with 1001/30000 fps\n");
- return -1;
- }
-
- return 0;
-}
-
-static void put_header(MpegEncContext *s, int header)
-{
- align_put_bits(&s->pb);
- put_bits(&s->pb, 16, header>>16);
- put_bits(&s->pb, 16, header&0xFFFF);
-}
-
-/* put sequence header if needed */
-static void mpeg1_encode_sequence_header(MpegEncContext *s)
-{
- unsigned int vbv_buffer_size;
- unsigned int fps, v;
- int i;
- uint64_t time_code;
- float best_aspect_error= 1E10;
- float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
- int constraint_parameter_flag;
-
- if(aspect_ratio==0.0) aspect_ratio= 1.0; //pixel aspect 1:1 (VGA)
-
- if (s->current_picture.key_frame) {
- AVRational framerate= ff_frame_rate_tab[s->frame_rate_index];
-
- /* mpeg1 header repeated every gop */
- put_header(s, SEQ_START_CODE);
-
- put_bits(&s->pb, 12, s->width);
- put_bits(&s->pb, 12, s->height);
-
- for(i=1; i<15; i++){
- float error= aspect_ratio;
- if(s->codec_id == CODEC_ID_MPEG1VIDEO || i <=1)
- error-= 1.0/mpeg1_aspect[i];
- else
- error-= av_q2d(mpeg2_aspect[i])*s->height/s->width;
-
- error= FFABS(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);
-
- if(s->avctx->rc_max_rate){
- v = (s->avctx->rc_max_rate + 399) / 400;
- if (v > 0x3ffff && s->codec_id == CODEC_ID_MPEG1VIDEO)
- v = 0x3ffff;
- }else{
- v= 0x3FFFF;
- }
-
- if(s->avctx->rc_buffer_size)
- vbv_buffer_size = s->avctx->rc_buffer_size;
- else
- /* VBV calculation: Scaled so that a VCD has the proper VBV size of 40 kilobytes */
- vbv_buffer_size = (( 20 * s->bit_rate) / (1151929 / 2)) * 8 * 1024;
- vbv_buffer_size= (vbv_buffer_size + 16383) / 16384;
-
- put_bits(&s->pb, 18, v & 0x3FFFF);
- put_bits(&s->pb, 1, 1); /* marker */
- put_bits(&s->pb, 10, vbv_buffer_size & 0x3FF);
-
- constraint_parameter_flag=
- s->width <= 768 && s->height <= 576 &&
- s->mb_width * s->mb_height <= 396 &&
- s->mb_width * s->mb_height * framerate.num <= framerate.den*396*25 &&
- framerate.num <= framerate.den*30 &&
- s->avctx->me_range && s->avctx->me_range < 128 &&
- vbv_buffer_size <= 20 &&
- v <= 1856000/400 &&
- s->codec_id == CODEC_ID_MPEG1VIDEO;
-
- put_bits(&s->pb, 1, constraint_parameter_flag);
-
- ff_write_quant_matrix(&s->pb, s->avctx->intra_matrix);
- ff_write_quant_matrix(&s->pb, s->avctx->inter_matrix);
-
- if(s->codec_id == CODEC_ID_MPEG2VIDEO){
- put_header(s, EXT_START_CODE);
- put_bits(&s->pb, 4, 1); //seq ext
-
- put_bits(&s->pb, 1, s->avctx->profile == 0); //escx 1 for 4:2:2 profile */
-
- put_bits(&s->pb, 3, s->avctx->profile); //profile
- put_bits(&s->pb, 4, s->avctx->level); //level
-
- put_bits(&s->pb, 1, s->progressive_sequence);
- put_bits(&s->pb, 2, s->chroma_format);
- put_bits(&s->pb, 2, 0); //horizontal size ext
- put_bits(&s->pb, 2, 0); //vertical size ext
- put_bits(&s->pb, 12, v>>18); //bitrate ext
- put_bits(&s->pb, 1, 1); //marker
- put_bits(&s->pb, 8, vbv_buffer_size >>10); //vbv buffer ext
- put_bits(&s->pb, 1, s->low_delay);
- put_bits(&s->pb, 2, 0); // frame_rate_ext_n
- put_bits(&s->pb, 5, 0); // frame_rate_ext_d
- }
-
- put_header(s, GOP_START_CODE);
- put_bits(&s->pb, 1, !!(s->avctx->flags & CODEC_FLAG2_DROP_FRAME_TIMECODE)); /* drop frame flag */
- /* time code : we must convert from the real frame rate to a
- fake mpeg frame rate in case of low frame rate */
- fps = (framerate.num + framerate.den/2)/ framerate.den;
- time_code = s->current_picture_ptr->coded_picture_number + s->avctx->timecode_frame_start;
-
- s->gop_picture_number = s->current_picture_ptr->coded_picture_number;
- if (s->avctx->flags2 & CODEC_FLAG2_DROP_FRAME_TIMECODE) {
- /* only works for NTSC 29.97 */
- int d = time_code / 17982;
- int m = time_code % 17982;
- //if (m < 2) m += 2; /* not needed since -2,-1 / 1798 in C returns 0 */
- time_code += 18 * d + 2 * ((m - 2) / 1798);
- }
- 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_t)((time_code / fps) % 60));
- put_bits(&s->pb, 6, (uint32_t)((time_code % fps)));
- put_bits(&s->pb, 1, !!(s->flags & CODEC_FLAG_CLOSED_GOP));
- put_bits(&s->pb, 1, 0); /* broken link */
- }
-}
-
-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]);
-}
-#endif //CONFIG_ENCODERS
-
-static void common_init(MpegEncContext *s)
+void ff_mpeg12_common_init(MpegEncContext *s)
{
s->y_dc_scale_table=
memset(s->last_mv, 0, sizeof(s->last_mv));
}
-#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 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 */
-
- // RAL: s->picture_number instead of s->fake_picture_number
- put_bits(&s->pb, 10, (s->picture_number -
- s->gop_picture_number) & 0x3ff);
- put_bits(&s->pb, 3, s->pict_type);
-
- s->vbv_delay_ptr= s->pb.buf + put_bits_count(&s->pb)/8;
- put_bits(&s->pb, 16, 0xFFFF); /* vbv_delay */
-
- // 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 */
- if(s->codec_id == CODEC_ID_MPEG1VIDEO)
- put_bits(&s->pb, 3, s->f_code); /* forward_f_code */
- else
- put_bits(&s->pb, 3, 7); /* 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 */
- if(s->codec_id == CODEC_ID_MPEG1VIDEO)
- put_bits(&s->pb, 3, s->b_code); /* backward_f_code */
- else
- put_bits(&s->pb, 3, 7); /* backward_f_code */
- }
-
- put_bits(&s->pb, 1, 0); /* extra bit picture */
-
- s->frame_pred_frame_dct = 1;
- if(s->codec_id == CODEC_ID_MPEG2VIDEO){
- put_header(s, EXT_START_CODE);
- put_bits(&s->pb, 4, 8); //pic ext
- if (s->pict_type == P_TYPE || s->pict_type == B_TYPE) {
- put_bits(&s->pb, 4, s->f_code);
- put_bits(&s->pb, 4, s->f_code);
- }else{
- put_bits(&s->pb, 8, 255);
- }
- if (s->pict_type == B_TYPE) {
- put_bits(&s->pb, 4, s->b_code);
- put_bits(&s->pb, 4, s->b_code);
- }else{
- put_bits(&s->pb, 8, 255);
- }
- put_bits(&s->pb, 2, s->intra_dc_precision);
-
- assert(s->picture_structure == PICT_FRAME);
- put_bits(&s->pb, 2, s->picture_structure);
- if (s->progressive_sequence) {
- put_bits(&s->pb, 1, 0); /* no repeat */
- } else {
- put_bits(&s->pb, 1, s->current_picture_ptr->top_field_first);
- }
- /* XXX: optimize the generation of this flag with entropy
- measures */
- s->frame_pred_frame_dct = s->progressive_sequence;
-
- put_bits(&s->pb, 1, s->frame_pred_frame_dct);
- put_bits(&s->pb, 1, s->concealment_motion_vectors);
- put_bits(&s->pb, 1, s->q_scale_type);
- put_bits(&s->pb, 1, s->intra_vlc_format);
- put_bits(&s->pb, 1, s->alternate_scan);
- put_bits(&s->pb, 1, s->repeat_first_field);
- s->progressive_frame = s->progressive_sequence;
- put_bits(&s->pb, 1, s->chroma_format == CHROMA_420 ? s->progressive_frame : 0); /* chroma_420_type */
- put_bits(&s->pb, 1, s->progressive_frame);
- put_bits(&s->pb, 1, 0); //composite_display_flag
- }
- if(s->flags & CODEC_FLAG_SVCD_SCAN_OFFSET){
- int i;
-
- put_header(s, USER_START_CODE);
- for(i=0; i<sizeof(svcd_scan_offset_placeholder); i++){
- put_bits(&s->pb, 8, svcd_scan_offset_placeholder[i]);
- }
- }
-
- s->mb_y=0;
- ff_mpeg1_encode_slice_header(s);
-}
-
-static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
- int has_mv, int field_motion)
-{
- put_bits(&s->pb, n, bits);
- if (!s->frame_pred_frame_dct) {
- if (has_mv)
- put_bits(&s->pb, 2, 2 - field_motion); /* motion_type: frame/field */
- put_bits(&s->pb, 1, s->interlaced_dct);
- }
-}
-
-static av_always_inline void mpeg1_encode_mb_internal(MpegEncContext *s,
- DCTELEM block[6][64],
- int motion_x, int motion_y,
- int mb_block_count)
-{
- 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;
- for(i=0;i<mb_block_count;i++) {
- if (s->block_last_index[i] >= 0)
- cbp |= 1 << (mb_block_count - 1 - i);
- }
-
- if (cbp == 0 && !first_mb && s->mv_type == MV_TYPE_16X16 &&
- (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
- ((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++;
- if(s->pict_type == P_TYPE){
- s->last_mv[0][1][0]= s->last_mv[0][0][0]=
- s->last_mv[0][1][1]= s->last_mv[0][0][1]= 0;
- }
- } else {
- 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);
- }
-
- if (s->pict_type == I_TYPE) {
- if(s->dquant && cbp){
- put_mb_modes(s, 2, 1, 0, 0); /* macroblock_type : macroblock_quant = 1 */
- put_bits(&s->pb, 5, s->qscale);
- }else{
- put_mb_modes(s, 1, 1, 0, 0); /* macroblock_type : macroblock_quant = 0 */
- s->qscale -= s->dquant;
- }
- s->misc_bits+= get_bits_diff(s);
- s->i_count++;
- } else if (s->mb_intra) {
- if(s->dquant && cbp){
- put_mb_modes(s, 6, 0x01, 0, 0);
- put_bits(&s->pb, 5, s->qscale);
- }else{
- put_mb_modes(s, 5, 0x03, 0, 0);
- s->qscale -= s->dquant;
- }
- s->misc_bits+= get_bits_diff(s);
- s->i_count++;
- memset(s->last_mv, 0, sizeof(s->last_mv));
- } else if (s->pict_type == P_TYPE) {
- if(s->mv_type == MV_TYPE_16X16){
- if (cbp != 0) {
- if ((motion_x|motion_y) == 0) {
- if(s->dquant){
- put_mb_modes(s, 5, 1, 0, 0); /* macroblock_pattern & quant */
- put_bits(&s->pb, 5, s->qscale);
- }else{
- put_mb_modes(s, 2, 1, 0, 0); /* macroblock_pattern only */
- }
- s->misc_bits+= get_bits_diff(s);
- } else {
- if(s->dquant){
- put_mb_modes(s, 5, 2, 1, 0); /* motion + cbp */
- put_bits(&s->pb, 5, s->qscale);
- }else{
- put_mb_modes(s, 1, 1, 1, 0); /* motion + cbp */
- }
- s->misc_bits+= get_bits_diff(s);
- 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);
- }
- } else {
- put_bits(&s->pb, 3, 1); /* motion only */
- if (!s->frame_pred_frame_dct)
- put_bits(&s->pb, 2, 2); /* motion_type: frame */
- s->misc_bits+= get_bits_diff(s);
- 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->last_mv[0][1][0]= s->last_mv[0][0][0]= motion_x;
- s->last_mv[0][1][1]= s->last_mv[0][0][1]= motion_y;
- }else{
- assert(!s->frame_pred_frame_dct && s->mv_type == MV_TYPE_FIELD);
-
- if (cbp) {
- if(s->dquant){
- put_mb_modes(s, 5, 2, 1, 1); /* motion + cbp */
- put_bits(&s->pb, 5, s->qscale);
- }else{
- put_mb_modes(s, 1, 1, 1, 1); /* motion + cbp */
- }
- } else {
- put_bits(&s->pb, 3, 1); /* motion only */
- put_bits(&s->pb, 2, 1); /* motion_type: field */
- s->qscale -= s->dquant;
- }
- s->misc_bits+= get_bits_diff(s);
- for(i=0; i<2; i++){
- put_bits(&s->pb, 1, s->field_select[0][i]);
- mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
- mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
- s->last_mv[0][i][0]= s->mv[0][i][0];
- s->last_mv[0][i][1]= 2*s->mv[0][i][1];
- }
- s->mv_bits+= get_bits_diff(s);
- }
- if(cbp) {
- if (s->chroma_y_shift) {
- put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
- } else {
- put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]);
- put_bits(&s->pb, 2, cbp & 3);
- }
- }
- s->f_count++;
- } else{
- static const int mb_type_len[4]={0,3,4,2}; //bak,for,bi
-
- if(s->mv_type == MV_TYPE_16X16){
- if (cbp){ // With coded bloc pattern
- if (s->dquant) {
- if(s->mv_dir == MV_DIR_FORWARD)
- put_mb_modes(s, 6, 3, 1, 0);
- else
- put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 0);
- put_bits(&s->pb, 5, s->qscale);
- } else {
- put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 0);
- }
- }else{ // No coded bloc pattern
- put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
- if (!s->frame_pred_frame_dct)
- put_bits(&s->pb, 2, 2); /* motion_type: frame */
- s->qscale -= s->dquant;
- }
- s->misc_bits += get_bits_diff(s);
- if (s->mv_dir&MV_DIR_FORWARD){
- 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);
- s->last_mv[0][0][0]=s->last_mv[0][1][0]= s->mv[0][0][0];
- s->last_mv[0][0][1]=s->last_mv[0][1][1]= s->mv[0][0][1];
- s->f_count++;
- }
- if (s->mv_dir&MV_DIR_BACKWARD){
- 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->last_mv[1][0][0]=s->last_mv[1][1][0]= s->mv[1][0][0];
- s->last_mv[1][0][1]=s->last_mv[1][1][1]= s->mv[1][0][1];
- s->b_count++;
- }
- }else{
- assert(s->mv_type == MV_TYPE_FIELD);
- assert(!s->frame_pred_frame_dct);
- if (cbp){ // With coded bloc pattern
- if (s->dquant) {
- if(s->mv_dir == MV_DIR_FORWARD)
- put_mb_modes(s, 6, 3, 1, 1);
- else
- put_mb_modes(s, mb_type_len[s->mv_dir]+3, 2, 1, 1);
- put_bits(&s->pb, 5, s->qscale);
- } else {
- put_mb_modes(s, mb_type_len[s->mv_dir], 3, 1, 1);
- }
- }else{ // No coded bloc pattern
- put_bits(&s->pb, mb_type_len[s->mv_dir], 2);
- put_bits(&s->pb, 2, 1); /* motion_type: field */
- s->qscale -= s->dquant;
- }
- s->misc_bits += get_bits_diff(s);
- if (s->mv_dir&MV_DIR_FORWARD){
- for(i=0; i<2; i++){
- put_bits(&s->pb, 1, s->field_select[0][i]);
- mpeg1_encode_motion(s, s->mv[0][i][0] - s->last_mv[0][i][0] , s->f_code);
- mpeg1_encode_motion(s, s->mv[0][i][1] - (s->last_mv[0][i][1]>>1), s->f_code);
- s->last_mv[0][i][0]= s->mv[0][i][0];
- s->last_mv[0][i][1]= 2*s->mv[0][i][1];
- }
- s->f_count++;
- }
- if (s->mv_dir&MV_DIR_BACKWARD){
- for(i=0; i<2; i++){
- put_bits(&s->pb, 1, s->field_select[1][i]);
- mpeg1_encode_motion(s, s->mv[1][i][0] - s->last_mv[1][i][0] , s->b_code);
- mpeg1_encode_motion(s, s->mv[1][i][1] - (s->last_mv[1][i][1]>>1), s->b_code);
- s->last_mv[1][i][0]= s->mv[1][i][0];
- s->last_mv[1][i][1]= 2*s->mv[1][i][1];
- }
- s->b_count++;
- }
- }
- s->mv_bits += get_bits_diff(s);
- if(cbp) {
- if (s->chroma_y_shift) {
- put_bits(&s->pb, mbPatTable[cbp][1], mbPatTable[cbp][0]);
- } else {
- put_bits(&s->pb, mbPatTable[cbp>>2][1], mbPatTable[cbp>>2][0]);
- put_bits(&s->pb, 2, cbp & 3);
- }
- }
- }
- for(i=0;i<mb_block_count;i++) {
- if (cbp & (1 << (mb_block_count - 1 - i))) {
- mpeg1_encode_block(s, block[i], i);
- }
- }
- 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);
- }
-}
-
-void mpeg1_encode_mb(MpegEncContext *s, DCTELEM block[6][64], int motion_x, int motion_y)
-{
- if (s->chroma_format == CHROMA_420) mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 6);
- else mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
-}
-
-// 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, bits, range, sign;
-
- if (val == 0) {
- /* zero vector */
- code = 0;
- put_bits(&s->pb,
- mbMotionVectorTable[0][1],
- mbMotionVectorTable[0][0]);
- } else {
- bit_size = f_or_b_code - 1;
- range = 1 << bit_size;
- /* modulo encoding */
- l= INT_BIT - 5 - bit_size;
- val= (val<<l)>>l;
-
- if (val >= 0) {
- val--;
- code = (val >> bit_size) + 1;
- bits = val & (range - 1);
- sign = 0;
- } else {
- val = -val;
- val--;
- code = (val >> bit_size) + 1;
- 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);
- }
- }
-}
-
-void ff_mpeg1_encode_init(MpegEncContext *s)
-{
- static int done=0;
-
- common_init(s);
-
- if(!done){
- int f_code;
- int mv;
- int i;
-
- done=1;
- init_rl(&rl_mpeg1, 1);
- if(s->intra_vlc_format)
- init_rl(&rl_mpeg2, 1);
-
- 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_len);
- if(s->intra_vlc_format)
- init_uni_ac_vlc(&rl_mpeg2, uni_mpeg2_ac_vlc_len);
-
- /* build unified dc encoding tables */
- for(i=-255; i<256; i++)
- {
- int adiff, index;
- int bits, code;
- int diff=i;
-
- adiff = FFABS(diff);
- if(diff<0) diff--;
- index = av_log2(2*adiff);
-
- bits= vlc_dc_lum_bits[index] + index;
- code= (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1));
- mpeg1_lum_dc_uni[i+255]= bits + (code<<8);
-
- bits= vlc_dc_chroma_bits[index] + index;
- code= (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1));
- 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;
-
- if(mv==0) len= mbMotionVectorTable[0][1];
- else{
- int val, bit_size, range, code;
-
- bit_size = f_code - 1;
- range = 1 << bit_size;
-
- val=mv;
- if (val < 0)
- val = -val;
- val--;
- code = (val >> bit_size) + 1;
- if(code<17){
- len= mbMotionVectorTable[code][1] + 1 + bit_size;
- }else{
- len= mbMotionVectorTable[16][1] + 2 + bit_size;
- }
- }
-
- mv_penalty[f_code][mv+MAX_MV]= len;
- }
- }
-
-
- for(f_code=MAX_FCODE; f_code>0; f_code--){
- for(mv=-(8<<f_code); mv<(8<<f_code); mv++){
- fcode_tab[mv+MAX_MV]= f_code;
- }
- }
- }
- s->me.mv_penalty= mv_penalty;
- s->fcode_tab= fcode_tab;
- if(s->codec_id == CODEC_ID_MPEG1VIDEO){
- s->min_qcoeff=-255;
- s->max_qcoeff= 255;
- }else{
- s->min_qcoeff=-2047;
- s->max_qcoeff= 2047;
- }
- if (s->intra_vlc_format) {
- s->intra_ac_vlc_length=
- s->intra_ac_vlc_last_length= uni_mpeg2_ac_vlc_len;
- } else {
- s->intra_ac_vlc_length=
- s->intra_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
- }
- s->inter_ac_vlc_length=
- s->inter_ac_vlc_last_length= uni_mpeg1_ac_vlc_len;
-}
-
-static inline void encode_dc(MpegEncContext *s, int diff, int component)
-{
- if(((unsigned) (diff+255)) >= 511){
- int index;
-
- if(diff<0){
- index= av_log2_16bit(-2*diff);
- diff--;
- }else{
- index= av_log2_16bit(2*diff);
- }
- if (component == 0) {
- put_bits(
- &s->pb,
- vlc_dc_lum_bits[index] + index,
- (vlc_dc_lum_code[index]<<index) + (diff & ((1 << index) - 1)));
- }else{
- put_bits(
- &s->pb,
- vlc_dc_chroma_bits[index] + index,
- (vlc_dc_chroma_code[index]<<index) + (diff & ((1 << index) - 1)));
- }
- }else{
- if (component == 0) {
- put_bits(
- &s->pb,
- mpeg1_lum_dc_uni[diff+255]&0xFF,
- mpeg1_lum_dc_uni[diff+255]>>8);
- } else {
- put_bits(
- &s->pb,
- mpeg1_chr_dc_uni[diff+255]&0xFF,
- mpeg1_chr_dc_uni[diff+255]>>8);
- }
- }
-}
-
-static void mpeg1_encode_block(MpegEncContext *s,
- DCTELEM *block,
- int n)
-{
- int alevel, level, last_non_zero, dc, diff, i, j, run, last_index, sign;
- int code, component;
- const uint16_t (*table_vlc)[2] = rl_mpeg1.table_vlc;
-
- last_index = s->block_last_index[n];
-
- /* DC coef */
- if (s->mb_intra) {
- component = (n <= 3 ? 0 : (n&1) + 1);
- dc = block[0]; /* overflow is impossible */
- diff = dc - s->last_dc[component];
- encode_dc(s, diff, component);
- s->last_dc[component] = dc;
- i = 1;
- if (s->intra_vlc_format)
- table_vlc = rl_mpeg2.table_vlc;
- } else {
- /* encode the first coefficient : needs to be done here because
- it is handled slightly differently */
- level = block[0];
- if (abs(level) == 1) {
- code = ((uint32_t)level >> 31); /* the sign bit */
- put_bits(&s->pb, 2, code | 0x02);
- i = 1;
- } else {
- i = 0;
- last_non_zero = -1;
- goto next_coef;
- }
- }
-
- /* now quantify & encode AC coefs */
- last_non_zero = i - 1;
-
- for(;i<=last_index;i++) {
- j = s->intra_scantable.permutated[i];
- level = block[j];
- next_coef:
-#if 0
- if (level != 0)
- dprintf("level[%d]=%d\n", i, level);
-#endif
- /* encode using VLC */
- if (level != 0) {
- run = i - last_non_zero - 1;
-
- alevel= level;
- MASK_ABS(sign, alevel)
- sign&=1;
-
- if (alevel <= mpeg1_max_level[0][run]){
- code= mpeg1_index_run[0][run] + alevel - 1;
- /* store the vlc & sign at once */
- put_bits(&s->pb, table_vlc[code][1]+1, (table_vlc[code][0]<<1) + sign);
- } else {
- /* escape seems to be pretty rare <5% so i dont optimize it */
- put_bits(&s->pb, table_vlc[111][1], table_vlc[111][0]);
- /* escape: only clip in this case */
- put_bits(&s->pb, 6, run);
- if(s->codec_id == CODEC_ID_MPEG1VIDEO){
- if (alevel < 128) {
- put_bits(&s->pb, 8, level & 0xff);
- } else {
- if (level < 0) {
- put_bits(&s->pb, 16, 0x8001 + level + 255);
- } else {
- put_bits(&s->pb, 16, level & 0xffff);
- }
- }
- }else{
- put_bits(&s->pb, 12, level & 0xfff);
- }
- }
- last_non_zero = i;
- }
- }
- /* end of block */
- put_bits(&s->pb, table_vlc[112][1], table_vlc[112][0]);
-}
-#endif //CONFIG_ENCODERS
/******************************************/
/* decoding */
done = 1;
init_vlc(&dc_lum_vlc, DC_VLC_BITS, 12,
- vlc_dc_lum_bits, 1, 1,
- vlc_dc_lum_code, 2, 2, 1);
+ ff_mpeg12_vlc_dc_lum_bits, 1, 1,
+ ff_mpeg12_vlc_dc_lum_code, 2, 2, 1);
init_vlc(&dc_chroma_vlc, DC_VLC_BITS, 12,
- vlc_dc_chroma_bits, 1, 1,
- vlc_dc_chroma_code, 2, 2, 1);
+ ff_mpeg12_vlc_dc_chroma_bits, 1, 1,
+ ff_mpeg12_vlc_dc_chroma_code, 2, 2, 1);
init_vlc(&mv_vlc, MV_VLC_BITS, 17,
- &mbMotionVectorTable[0][1], 2, 1,
- &mbMotionVectorTable[0][0], 2, 1, 1);
+ &ff_mpeg12_mbMotionVectorTable[0][1], 2, 1,
+ &ff_mpeg12_mbMotionVectorTable[0][0], 2, 1, 1);
init_vlc(&mbincr_vlc, MBINCR_VLC_BITS, 36,
- &mbAddrIncrTable[0][1], 2, 1,
- &mbAddrIncrTable[0][0], 2, 1, 1);
+ &ff_mpeg12_mbAddrIncrTable[0][1], 2, 1,
+ &ff_mpeg12_mbAddrIncrTable[0][0], 2, 1, 1);
init_vlc(&mb_pat_vlc, MB_PAT_VLC_BITS, 64,
- &mbPatTable[0][1], 2, 1,
- &mbPatTable[0][0], 2, 1, 1);
+ &ff_mpeg12_mbPatTable[0][1], 2, 1,
+ &ff_mpeg12_mbPatTable[0][0], 2, 1, 1);
init_vlc(&mb_ptype_vlc, MB_PTYPE_VLC_BITS, 7,
&table_mb_ptype[0][1], 2, 1,
init_vlc(&mb_btype_vlc, MB_BTYPE_VLC_BITS, 11,
&table_mb_btype[0][1], 2, 1,
&table_mb_btype[0][0], 2, 1, 1);
- init_rl(&rl_mpeg1, 1);
- init_rl(&rl_mpeg2, 1);
+ init_rl(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
+ init_rl(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
- init_2d_vlc_rl(&rl_mpeg1, 1);
- init_2d_vlc_rl(&rl_mpeg2, 1);
+ init_2d_vlc_rl(&ff_rl_mpeg1, 1);
+ init_2d_vlc_rl(&ff_rl_mpeg2, 1);
}
}
int i, j, k, cbp, val, mb_type, motion_type;
const int mb_block_count = 4 + (1<< s->chroma_format);
- dprintf("decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
+ dprintf(s->avctx, "decode_mb: x=%d y=%d\n", s->mb_x, s->mb_y);
assert(s->mb_skipped==0);
if (s->mb_skip_run-- != 0) {
- if(s->pict_type == I_TYPE){
- av_log(s->avctx, AV_LOG_ERROR, "skipped 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<12;i++)
- s->block_last_index[i] = -1;
- if(s->picture_structure == PICT_FRAME)
- s->mv_type = MV_TYPE_16X16;
- else
- s->mv_type = MV_TYPE_FIELD;
if (s->pict_type == P_TYPE) {
- /* if P type, zero motion vector is implied */
- s->mv_dir = MV_DIR_FORWARD;
- 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->field_select[0][0]= s->picture_structure - 1;
s->mb_skipped = 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(IS_INTRA(mb_type))
return -1;
- /* 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 ]=
mb_type | 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));
mb_type = btype2mb_type[ mb_type ];
break;
}
- dprintf("mb_type=%x\n", mb_type);
+ dprintf(s->avctx, "mb_type=%x\n", mb_type);
// motion_type = 0; /* avoid warning */
if (IS_INTRA(mb_type)) {
s->dsp.clear_blocks(s->block[0]);
if (mb_type & MB_TYPE_ZERO_MV){
assert(mb_type & MB_TYPE_CBP);
- /* 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;
- if(s->picture_structure == PICT_FRAME)
+ if(s->picture_structure == PICT_FRAME){
+ if(!s->frame_pred_frame_dct)
+ s->interlaced_dct = get_bits1(&s->gb);
s->mv_type = MV_TYPE_16X16;
- else{
+ }else{
s->mv_type = MV_TYPE_FIELD;
mb_type |= MB_TYPE_INTERLACED;
s->field_select[0][0]= s->picture_structure - 1;
}
+
+ if (IS_QUANT(mb_type))
+ s->qscale = get_qscale(s);
+
s->last_mv[0][0][0] = 0;
s->last_mv[0][0][1] = 0;
s->last_mv[0][1][0] = 0;
}else{
assert(mb_type & MB_TYPE_L0L1);
//FIXME decide if MBs in field pictures are MB_TYPE_INTERLACED
- /* get additionnal motion vector type */
+ /* get additional 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 && HAS_CBP(mb_type)) {
- s->interlaced_dct = get_bits1(&s->gb);
+ if (s->picture_structure == PICT_FRAME && HAS_CBP(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) {
+ s->mv_dir= (mb_type>>13)&3;
+ dprintf(s->avctx, "motion_type=%d\n", motion_type);
+ switch(motion_type) {
+ case MT_FRAME: /* or MT_16X8 */
+ if (s->picture_structure == PICT_FRAME) {
+ mb_type |= MB_TYPE_16x16;
+ s->mv_type = MV_TYPE_16X16;
+ for(i=0;i<2;i++) {
+ if (USES_LIST(mb_type, i)) {
/* 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] =
s->mv[i][0][0] <<= 1;
s->mv[i][0][1] <<= 1;
}
- } else {
+ }
+ }
+ } else {
+ mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
+ s->mv_type = MV_TYPE_16X8;
+ for(i=0;i<2;i++) {
+ if (USES_LIST(mb_type, i)) {
/* MT_16X8 */
- mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
- 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++) {
}
}
}
- break;
- case MT_FIELD:
- s->mv_type = MV_TYPE_FIELD;
- if (s->picture_structure == PICT_FRAME) {
- mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
+ }
+ }
+ break;
+ case MT_FIELD:
+ s->mv_type = MV_TYPE_FIELD;
+ if (s->picture_structure == PICT_FRAME) {
+ mb_type |= MB_TYPE_16x8 | MB_TYPE_INTERLACED;
+ for(i=0;i<2;i++) {
+ if (USES_LIST(mb_type, i)) {
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);
+ dprintf(s->avctx, "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);
+ dprintf(s->avctx, "fmy=%d\n", val);
}
- } else {
- mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
+ }
+ }
+ } else {
+ mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
+ for(i=0;i<2;i++) {
+ if (USES_LIST(mb_type, i)) {
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->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;
-
-
- s->last_mv[i][0][1] = my<<1;
- s->last_mv[i][1][1] = my<<1;
-
- s->mv[i][0][0] = mx;
- s->mv[i][0][1] = my;
- s->mv[i][1][0] = mx;//not used
- s->mv[i][1][1] = my;//not used
-
- if (s->picture_structure == PICT_FRAME) {
- mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
-
- //m = 1 + 2 * s->top_field_first;
- m = s->top_field_first ? 1 : 3;
-
- /* top -> top pred */
- s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
- s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
- m = 4 - m;
- 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->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
- s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
- if(s->picture_structure == PICT_TOP_FIELD)
- s->mv[i][2][1]--;
- else
- s->mv[i][2][1]++;
- }
+ }
+ }
+ break;
+ case MT_DMV:
+ s->mv_type = MV_TYPE_DMV;
+ for(i=0;i<2;i++) {
+ if (USES_LIST(mb_type, i)) {
+ 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->last_mv[i][0][1] = my<<1;
+ s->last_mv[i][1][1] = my<<1;
+
+ s->mv[i][0][0] = mx;
+ s->mv[i][0][1] = my;
+ s->mv[i][1][0] = mx;//not used
+ s->mv[i][1][1] = my;//not used
+
+ if (s->picture_structure == PICT_FRAME) {
+ mb_type |= MB_TYPE_16x16 | MB_TYPE_INTERLACED;
+
+ //m = 1 + 2 * s->top_field_first;
+ m = s->top_field_first ? 1 : 3;
+
+ /* top -> top pred */
+ s->mv[i][2][0] = ((mx * m + (mx > 0)) >> 1) + dmx;
+ s->mv[i][2][1] = ((my * m + (my > 0)) >> 1) + dmy - 1;
+ m = 4 - m;
+ 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->mv[i][2][0] = ((mx + (mx > 0)) >> 1) + dmx;
+ s->mv[i][2][1] = ((my + (my > 0)) >> 1) + dmy;
+ if(s->picture_structure == PICT_TOP_FIELD)
+ s->mv[i][2][1]--;
+ else
+ s->mv[i][2][1]++;
}
- break;
- default:
- av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
- return -1;
}
}
+ break;
+ default:
+ av_log(s->avctx, AV_LOG_ERROR, "00 motion_type at %d %d\n", s->mb_x, s->mb_y);
+ return -1;
}
}
if (HAS_CBP(mb_type)) {
s->dsp.clear_blocks(s->block[0]);
- if(!s->chroma_y_shift){
- s->dsp.clear_blocks(s->block[6]);
- }
-
cbp = get_vlc2(&s->gb, mb_pat_vlc.table, MB_PAT_VLC_BITS, 1);
- if (cbp < 0 || ((cbp == 0) && (s->chroma_format < 2)) ){
- av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
- return -1;
- }
if(mb_block_count > 6){
cbp<<= mb_block_count-6;
cbp |= get_bits(&s->gb, mb_block_count-6);
+ s->dsp.clear_blocks(s->block[6]);
+ }
+ if (cbp <= 0){
+ av_log(s->avctx, AV_LOG_ERROR, "invalid cbp at %d %d\n", s->mb_x, s->mb_y);
+ return -1;
}
#ifdef HAVE_XVMC
{
int level, dc, diff, i, j, run;
int component;
- RLTable *rl = &rl_mpeg1;
+ RLTable *rl = &ff_rl_mpeg1;
uint8_t * const scantable= s->intra_scantable.permutated;
const uint16_t *quant_matrix= s->intra_matrix;
const int qscale= s->qscale;
dc += diff;
s->last_dc[component] = dc;
block[0] = dc<<3;
- dprintf("dc=%d diff=%d\n", dc, diff);
+ dprintf(s->avctx, "dc=%d diff=%d\n", dc, diff);
i = 0;
{
OPEN_READER(re, &s->gb);
int n)
{
int level, i, j, run;
- RLTable *rl = &rl_mpeg1;
+ RLTable *rl = &ff_rl_mpeg1;
uint8_t * const scantable= s->intra_scantable.permutated;
const uint16_t *quant_matrix= s->inter_matrix;
const int qscale= s->qscale;
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
goto end;
}
-
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
/* now quantify & encode AC coefs */
for(;;) {
GET_RL_VLC(level, run, re, &s->gb, rl->rl_vlc[0], TEX_VLC_BITS, 2, 0);
}
block[j] = level;
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
break;
+#if MIN_CACHE_BITS >= 19
UPDATE_CACHE(re, &s->gb);
+#endif
}
end:
LAST_SKIP_BITS(re, &s->gb, 2);
static inline int mpeg1_fast_decode_block_inter(MpegEncContext *s, DCTELEM *block, int n)
{
int level, i, j, run;
- RLTable *rl = &rl_mpeg1;
+ RLTable *rl = &ff_rl_mpeg1;
uint8_t * const scantable= s->intra_scantable.permutated;
const int qscale= s->qscale;
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
goto end;
}
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
/* now quantify & encode AC coefs */
for(;;) {
}
block[j] = level;
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
break;
+#if MIN_CACHE_BITS >= 19
UPDATE_CACHE(re, &s->gb);
+#endif
}
end:
LAST_SKIP_BITS(re, &s->gb, 2);
int n)
{
int level, i, j, run;
- RLTable *rl = &rl_mpeg1;
+ RLTable *rl = &ff_rl_mpeg1;
uint8_t * const scantable= s->intra_scantable.permutated;
const uint16_t *quant_matrix;
const int qscale= s->qscale;
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
goto end;
}
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
/* now quantify & encode AC coefs */
for(;;) {
mismatch ^= level;
block[j] = level;
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
break;
+#if MIN_CACHE_BITS >= 19
UPDATE_CACHE(re, &s->gb);
+#endif
}
end:
LAST_SKIP_BITS(re, &s->gb, 2);
int n)
{
int level, i, j, run;
- RLTable *rl = &rl_mpeg1;
+ RLTable *rl = &ff_rl_mpeg1;
uint8_t * const scantable= s->intra_scantable.permutated;
const int qscale= s->qscale;
OPEN_READER(re, &s->gb);
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
goto end;
}
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
/* now quantify & encode AC coefs */
for(;;) {
}
block[j] = level;
+#if MIN_CACHE_BITS < 19
+ UPDATE_CACHE(re, &s->gb);
+#endif
if(((int32_t)GET_CACHE(re, &s->gb)) <= (int32_t)0xBFFFFFFF)
break;
+#if MIN_CACHE_BITS >=19
UPDATE_CACHE(re, &s->gb);
+#endif
}
end:
LAST_SKIP_BITS(re, &s->gb, 2);
dc += diff;
s->last_dc[component] = dc;
block[0] = dc << (3 - s->intra_dc_precision);
- dprintf("dc=%d\n", block[0]);
+ dprintf(s->avctx, "dc=%d\n", block[0]);
mismatch = block[0] ^ 1;
i = 0;
if (s->intra_vlc_format)
- rl = &rl_mpeg2;
+ rl = &ff_rl_mpeg2;
else
- rl = &rl_mpeg1;
+ rl = &ff_rl_mpeg1;
{
OPEN_READER(re, &s->gb);
s->last_dc[component] = dc;
block[0] = dc << (3 - s->intra_dc_precision);
if (s->intra_vlc_format)
- rl = &rl_mpeg2;
+ rl = &ff_rl_mpeg2;
else
- rl = &rl_mpeg1;
+ rl = &ff_rl_mpeg1;
{
OPEN_READER(re, &s->gb);
int slice_count;
int swap_uv;//indicate VCR2
int save_aspect_info;
+ int save_width, save_height;
AVRational frame_rate_ext; ///< MPEG-2 specific framerate modificator
} Mpeg1Context;
s->mpeg_enc_ctx.avctx= avctx;
s->mpeg_enc_ctx.flags= avctx->flags;
s->mpeg_enc_ctx.flags2= avctx->flags2;
- common_init(&s->mpeg_enc_ctx);
+ ff_mpeg12_common_init(&s->mpeg_enc_ctx);
init_vlcs();
s->mpeg_enc_ctx_allocated = 0;
(s1->mpeg_enc_ctx_allocated == 0)||
avctx->coded_width != s->width ||
avctx->coded_height != s->height||
+ s1->save_width != s->width ||
+ s1->save_height != s->height ||
s1->save_aspect_info != s->aspect_ratio_info||
0)
{
avcodec_set_dimensions(avctx, s->width, s->height);
avctx->bit_rate = s->bit_rate;
s1->save_aspect_info = s->aspect_ratio_info;
+ s1->save_width = s->width;
+ s1->save_height = s->height;
//low_delay may be forced, in this case we will have B frames
//that behave like P frames
avctx->time_base.num= ff_frame_rate_tab[s->frame_rate_index].den;
//mpeg1 aspect
avctx->sample_aspect_ratio= av_d2q(
- 1.0/mpeg1_aspect[s->aspect_ratio_info], 255);
+ 1.0/ff_mpeg1_aspect[s->aspect_ratio_info], 255);
}else{//mpeg2
//mpeg2 fps
if( (s1->pan_scan.width == 0 )||(s1->pan_scan.height == 0) ){
s->avctx->sample_aspect_ratio=
av_div_q(
- mpeg2_aspect[s->aspect_ratio_info],
+ ff_mpeg2_aspect[s->aspect_ratio_info],
(AVRational){s->width, s->height}
);
}else{
s->avctx->sample_aspect_ratio=
av_div_q(
- mpeg2_aspect[s->aspect_ratio_info],
+ ff_mpeg2_aspect[s->aspect_ratio_info],
(AVRational){s1->pan_scan.width, s1->pan_scan.height}
);
}
}else{
s->avctx->sample_aspect_ratio=
- mpeg2_aspect[s->aspect_ratio_info];
+ ff_mpeg2_aspect[s->aspect_ratio_info];
}
}//mpeg2
s1->frame_rate_ext.num = get_bits(&s->gb, 2)+1;
s1->frame_rate_ext.den = get_bits(&s->gb, 5)+1;
- dprintf("sequence extension\n");
+ dprintf(s->avctx, "sequence extension\n");
s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
s->avctx->sub_id = 2; /* indicates mpeg2 found */
{
int i, v, j;
- dprintf("matrix extension\n");
+ dprintf(s->avctx, "matrix extension\n");
if (get_bits1(&s->gb)) {
for(i=0;i<64;i++) {
}
/* composite display not parsed */
- dprintf("intra_dc_precision=%d\n", s->intra_dc_precision);
- dprintf("picture_structure=%d\n", s->picture_structure);
- dprintf("top field first=%d\n", s->top_field_first);
- dprintf("repeat first field=%d\n", s->repeat_first_field);
- dprintf("conceal=%d\n", s->concealment_motion_vectors);
- dprintf("intra_vlc_format=%d\n", s->intra_vlc_format);
- dprintf("alternate_scan=%d\n", s->alternate_scan);
- dprintf("frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
- dprintf("progressive_frame=%d\n", s->progressive_frame);
+ dprintf(s->avctx, "intra_dc_precision=%d\n", s->intra_dc_precision);
+ dprintf(s->avctx, "picture_structure=%d\n", s->picture_structure);
+ dprintf(s->avctx, "top field first=%d\n", s->top_field_first);
+ dprintf(s->avctx, "repeat first field=%d\n", s->repeat_first_field);
+ dprintf(s->avctx, "conceal=%d\n", s->concealment_motion_vectors);
+ dprintf(s->avctx, "intra_vlc_format=%d\n", s->intra_vlc_format);
+ dprintf(s->avctx, "alternate_scan=%d\n", s->alternate_scan);
+ dprintf(s->avctx, "frame_pred_frame_dct=%d\n", s->frame_pred_frame_dct);
+ dprintf(s->avctx, "progressive_frame=%d\n", s->progressive_frame);
}
static void mpeg_decode_extension(AVCodecContext *avctx,
{
MpegEncContext *s = &s1->mpeg_enc_ctx;
AVCodecContext *avctx= s->avctx;
- int ret;
const int field_pic= s->picture_structure != PICT_FRAME;
const int lowres= s->avctx->lowres;
break;
}
}
+ if(s->mb_x >= (unsigned)s->mb_width){
+ av_log(s->avctx, AV_LOG_ERROR, "initial skip overflow\n");
+ return -1;
+ }
s->resync_mb_x= s->mb_x;
s->resync_mb_y= s->mb_y= mb_y;
XVMC_init_block(s);//set s->block
#endif
- ret = mpeg_decode_mb(s, s->block);
- s->chroma_qscale= s->qscale;
-
- dprintf("ret=%d\n", ret);
- if (ret < 0)
+ if(mpeg_decode_mb(s, s->block) < 0)
return -1;
if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
}
s->dest[0] += 16 >> lowres;
- s->dest[1] += 16 >> (s->chroma_x_shift + lowres);
- s->dest[2] += 16 >> (s->chroma_x_shift + lowres);
+ s->dest[1] +=(16 >> lowres) >> s->chroma_x_shift;
+ s->dest[2] +=(16 >> lowres) >> s->chroma_x_shift;
MPV_decode_mb(s, s->block);
break;
}
}
+ if(s->mb_skip_run){
+ int i;
+ if(s->pict_type == I_TYPE){
+ av_log(s->avctx, AV_LOG_ERROR, "skipped 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<12;i++)
+ s->block_last_index[i] = -1;
+ if(s->picture_structure == PICT_FRAME)
+ s->mv_type = MV_TYPE_16X16;
+ else
+ s->mv_type = MV_TYPE_FIELD;
+ if (s->pict_type == P_TYPE) {
+ /* if P type, zero motion vector is implied */
+ s->mv_dir = MV_DIR_FORWARD;
+ 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->field_select[0][0]= s->picture_structure - 1;
+ } 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];
+ }
+ }
}
}
eos: // end of slice
s->chroma_intra_matrix[j] = v;
}
#ifdef DEBUG
- dprintf("intra matrix present\n");
+ dprintf(s->avctx, "intra matrix present\n");
for(i=0;i<64;i++)
- dprintf(" %d", s->intra_matrix[s->dsp.idct_permutation[i]]);
- dprintf("\n");
+ dprintf(s->avctx, " %d", s->intra_matrix[s->dsp.idct_permutation[i]]);
+ dprintf(s->avctx, "\n");
#endif
} else {
for(i=0;i<64;i++) {
s->chroma_inter_matrix[j] = v;
}
#ifdef DEBUG
- dprintf("non intra matrix present\n");
+ dprintf(s->avctx, "non intra matrix present\n");
for(i=0;i<64;i++)
- dprintf(" %d", s->inter_matrix[s->dsp.idct_permutation[i]]);
- dprintf("\n");
+ dprintf(s->avctx, " %d", s->inter_matrix[s->dsp.idct_permutation[i]]);
+ dprintf(s->avctx, "\n");
#endif
} else {
for(i=0;i<64;i++) {
* 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(ParseContext *pc, const uint8_t *buf, int buf_size)
+int ff_mpeg1_find_frame_end(ParseContext *pc, const uint8_t *buf, int buf_size)
{
int i;
uint32_t state= pc->state;
pc->frame_start_found=1;
break;
}
+ if(state == SEQ_END_CODE){
+ pc->state=-1;
+ return i+1;
+ }
}
}
int ret, input_size;
AVFrame *picture = data;
MpegEncContext *s2 = &s->mpeg_enc_ctx;
- dprintf("fill_buffer\n");
+ dprintf(avctx, "fill_buffer\n");
- if (buf_size == 0) {
+ if (buf_size == 0 || (buf_size == 4 && AV_RB32(buf) == SEQ_END_CODE)) {
/* special case for last picture */
if (s2->low_delay==0 && s2->next_picture_ptr) {
*picture= *(AVFrame*)s2->next_picture_ptr;
}
if(s2->flags&CODEC_FLAG_TRUNCATED){
- int next= mpeg1_find_frame_end(&s2->parse_context, buf, buf_size);
+ int next= ff_mpeg1_find_frame_end(&s2->parse_context, buf, buf_size);
- if( ff_combine_frame(&s2->parse_context, next, &buf, &buf_size) < 0 )
+ if( ff_combine_frame(&s2->parse_context, next, (const uint8_t **)&buf, &buf_size) < 0 )
return buf_size;
}
int mb_y= start_code - SLICE_MIN_START_CODE;
if(s2->last_picture_ptr==NULL){
- /* skip b frames if we dont have reference frames */
+ /* Skip B-frames if we do not have reference frames. */
if(s2->pict_type==B_TYPE) break;
- /* skip P frames if we dont have reference frame no valid header */
+ /* Skip P-frames if we do not have reference frame no valid header. */
// if(s2->pict_type==P_TYPE && s2->first_field && !s2->first_slice) break;
}
- /* skip b frames if we are in a hurry */
+ /* Skip B-frames if we are in a hurry. */
if(avctx->hurry_up && s2->pict_type==B_TYPE) break;
if( (avctx->skip_frame >= AVDISCARD_NONREF && s2->pict_type==B_TYPE)
||(avctx->skip_frame >= AVDISCARD_NONKEY && s2->pict_type!=I_TYPE)
|| avctx->skip_frame >= AVDISCARD_ALL)
break;
- /* skip everything if we are in a hurry>=5 */
+ /* Skip everything if we are in a hurry>=5. */
if(avctx->hurry_up>=5) break;
if (!s->mpeg_enc_ctx_allocated) break;
return -1;
}
if(!s2->current_picture_ptr){
- av_log(avctx, AV_LOG_ERROR, "current_picture not initalized\n");
+ av_log(avctx, AV_LOG_ERROR, "current_picture not initialized\n");
return -1;
}
.flush= ff_mpeg_flush,
};
-#ifdef CONFIG_ENCODERS
-
-AVCodec mpeg1video_encoder = {
- "mpeg1video",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MPEG1VIDEO,
- sizeof(MpegEncContext),
- encode_init,
- MPV_encode_picture,
- MPV_encode_end,
- .supported_framerates= ff_frame_rate_tab+1,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, -1},
- .capabilities= CODEC_CAP_DELAY,
-};
-
-AVCodec mpeg2video_encoder = {
- "mpeg2video",
- CODEC_TYPE_VIDEO,
- CODEC_ID_MPEG2VIDEO,
- sizeof(MpegEncContext),
- encode_init,
- MPV_encode_picture,
- MPV_encode_end,
- .supported_framerates= ff_frame_rate_tab+1,
- .pix_fmts= (enum PixelFormat[]){PIX_FMT_YUV420P, PIX_FMT_YUV422P, -1},
- .capabilities= CODEC_CAP_DELAY,
-};
-#endif
-
#ifdef HAVE_XVMC
static int mpeg_mc_decode_init(AVCodecContext *avctx){
Mpeg1Context *s;
if( !(avctx->slice_flags & SLICE_FLAG_CODED_ORDER) )
return -1;
if( !(avctx->slice_flags & SLICE_FLAG_ALLOW_FIELD) ){
- dprintf("mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
+ dprintf(avctx, "mpeg12.c: XvMC decoder will work better if SLICE_FLAG_ALLOW_FIELD is set\n");
}
mpeg_decode_init(avctx);
s = avctx->priv_data;
#endif
-#ifdef CONFIG_MPEGVIDEO_PARSER
-static void mpegvideo_extract_headers(AVCodecParserContext *s,
- AVCodecContext *avctx,
- const uint8_t *buf, int buf_size)
-{
- ParseContext1 *pc = s->priv_data;
- const uint8_t *buf_end;
- uint32_t start_code;
- int frame_rate_index, ext_type, bytes_left;
- int frame_rate_ext_n, frame_rate_ext_d;
- int picture_structure, top_field_first, repeat_first_field, progressive_frame;
- int horiz_size_ext, vert_size_ext, bit_rate_ext;
-//FIXME replace the crap with get_bits()
- s->repeat_pict = 0;
- buf_end = buf + buf_size;
- while (buf < buf_end) {
- start_code= -1;
- buf= ff_find_start_code(buf, buf_end, &start_code);
- bytes_left = buf_end - buf;
- switch(start_code) {
- case PICTURE_START_CODE:
- if (bytes_left >= 2) {
- s->pict_type = (buf[1] >> 3) & 7;
- }
- break;
- case SEQ_START_CODE:
- if (bytes_left >= 7) {
- pc->width = (buf[0] << 4) | (buf[1] >> 4);
- pc->height = ((buf[1] & 0x0f) << 8) | buf[2];
- avcodec_set_dimensions(avctx, pc->width, pc->height);
- frame_rate_index = buf[3] & 0xf;
- pc->frame_rate.den = avctx->time_base.den = ff_frame_rate_tab[frame_rate_index].num;
- pc->frame_rate.num = avctx->time_base.num = ff_frame_rate_tab[frame_rate_index].den;
- avctx->bit_rate = ((buf[4]<<10) | (buf[5]<<2) | (buf[6]>>6))*400;
- avctx->codec_id = CODEC_ID_MPEG1VIDEO;
- avctx->sub_id = 1;
- }
- break;
- case EXT_START_CODE:
- if (bytes_left >= 1) {
- ext_type = (buf[0] >> 4);
- switch(ext_type) {
- case 0x1: /* sequence extension */
- if (bytes_left >= 6) {
- horiz_size_ext = ((buf[1] & 1) << 1) | (buf[2] >> 7);
- vert_size_ext = (buf[2] >> 5) & 3;
- bit_rate_ext = ((buf[2] & 0x1F)<<7) | (buf[3]>>1);
- frame_rate_ext_n = (buf[5] >> 5) & 3;
- frame_rate_ext_d = (buf[5] & 0x1f);
- pc->progressive_sequence = buf[1] & (1 << 3);
- avctx->has_b_frames= !(buf[5] >> 7);
-
- pc->width |=(horiz_size_ext << 12);
- pc->height |=( vert_size_ext << 12);
- avctx->bit_rate += (bit_rate_ext << 18) * 400;
- avcodec_set_dimensions(avctx, pc->width, pc->height);
- avctx->time_base.den = pc->frame_rate.den * (frame_rate_ext_n + 1);
- avctx->time_base.num = pc->frame_rate.num * (frame_rate_ext_d + 1);
- avctx->codec_id = CODEC_ID_MPEG2VIDEO;
- avctx->sub_id = 2; /* forces MPEG2 */
- }
- break;
- case 0x8: /* picture coding extension */
- if (bytes_left >= 5) {
- picture_structure = buf[2]&3;
- top_field_first = buf[3] & (1 << 7);
- repeat_first_field = buf[3] & (1 << 1);
- progressive_frame = buf[4] & (1 << 7);
-
- /* check if we must repeat the frame */
- if (repeat_first_field) {
- if (pc->progressive_sequence) {
- if (top_field_first)
- s->repeat_pict = 4;
- else
- s->repeat_pict = 2;
- } else if (progressive_frame) {
- s->repeat_pict = 1;
- }
- }
-
- /* the packet only represents half a frame
- XXX,FIXME maybe find a different solution */
- if(picture_structure != 3)
- s->repeat_pict = -1;
- }
- break;
- }
- }
- break;
- case -1:
- goto the_end;
- default:
- /* we stop parsing when we encounter a slice. It ensures
- that this function takes a negligible amount of time */
- if (start_code >= SLICE_MIN_START_CODE &&
- start_code <= SLICE_MAX_START_CODE)
- goto the_end;
- break;
- }
- }
- the_end: ;
-}
-
-static int mpegvideo_parse(AVCodecParserContext *s,
- AVCodecContext *avctx,
- uint8_t **poutbuf, int *poutbuf_size,
- const uint8_t *buf, int buf_size)
-{
- ParseContext1 *pc1 = s->priv_data;
- ParseContext *pc= &pc1->pc;
- int next;
-
- if(s->flags & PARSER_FLAG_COMPLETE_FRAMES){
- next= buf_size;
- }else{
- next= mpeg1_find_frame_end(pc, buf, buf_size);
-
- if (ff_combine_frame(pc, next, (uint8_t **)&buf, &buf_size) < 0) {
- *poutbuf = NULL;
- *poutbuf_size = 0;
- return buf_size;
- }
-
- }
- /* we have a full frame : we just parse the first few MPEG headers
- to have the full timing information. The time take by this
- function should be negligible for uncorrupted streams */
- mpegvideo_extract_headers(s, avctx, buf, buf_size);
-#if 0
- printf("pict_type=%d frame_rate=%0.3f repeat_pict=%d\n",
- s->pict_type, (double)avctx->time_base.den / avctx->time_base.num, s->repeat_pict);
-#endif
-
- *poutbuf = (uint8_t *)buf;
- *poutbuf_size = buf_size;
- return next;
-}
-
-static int mpegvideo_split(AVCodecContext *avctx,
- const uint8_t *buf, int buf_size)
-{
- int i;
- uint32_t state= -1;
-
- for(i=0; i<buf_size; i++){
- state= (state<<8) | buf[i];
- if(state != 0x1B3 && state != 0x1B5 && state < 0x200 && state >= 0x100)
- return i-3;
- }
- return 0;
-}
-
-AVCodecParser mpegvideo_parser = {
- { CODEC_ID_MPEG1VIDEO, CODEC_ID_MPEG2VIDEO },
- sizeof(ParseContext1),
- NULL,
- mpegvideo_parse,
- ff_parse1_close,
- mpegvideo_split,
-};
-#endif /* !CONFIG_MPEGVIDEO_PARSER */
-
/* this is ugly i know, but the alternative is too make
hundreds of vars global and prefix them with ff_mpeg1_
which is far uglier. */