/*
- * MPEG4 encoder/decoder internal header.
+ * MPEG-4 encoder/decoder internal header.
* Copyright (c) 2000,2001 Fabrice Bellard
* Copyright (c) 2002-2010 Michael Niedermayer <michaelni@gmx.at>
*
- * This file is part of FFmpeg.
+ * This file is part of Libav.
*
- * FFmpeg is free software; you can redistribute it and/or
+ * Libav is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
- * FFmpeg is distributed in the hope that it will be useful,
+ * Libav is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
- * License along with FFmpeg; if not, write to the Free Software
+ * License along with Libav; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#define AVCODEC_MPEG4VIDEO_H
#include <stdint.h>
+
#include "get_bits.h"
#include "mpegvideo.h"
#include "rl.h"
#define BIN_ONLY_SHAPE 2
#define GRAY_SHAPE 3
-#define SIMPLE_VO_TYPE 1
-#define CORE_VO_TYPE 3
-#define MAIN_VO_TYPE 4
-#define NBIT_VO_TYPE 5
-#define ARTS_VO_TYPE 10
-#define ACE_VO_TYPE 12
-#define ADV_SIMPLE_VO_TYPE 17
+#define SIMPLE_VO_TYPE 1
+#define CORE_VO_TYPE 3
+#define MAIN_VO_TYPE 4
+#define NBIT_VO_TYPE 5
+#define ARTS_VO_TYPE 10
+#define ACE_VO_TYPE 12
+#define ADV_SIMPLE_VO_TYPE 17
// aspect_ratio_info
#define EXTENDED_PAR 15
#define VISUAL_OBJ_STARTCODE 0x1B5
#define VOP_STARTCODE 0x1B6
-/* dc encoding for mpeg4 */
+typedef struct Mpeg4DecContext {
+ MpegEncContext m;
+
+ /// number of bits to represent the fractional part of time
+ int time_increment_bits;
+ int shape;
+ int vol_sprite_usage;
+ int sprite_brightness_change;
+ int num_sprite_warping_points;
+ /// sprite trajectory points
+ uint16_t sprite_traj[4][2];
+ /// sprite shift [isChroma]
+ int sprite_shift[2];
+
+ // reversible vlc
+ int rvlc;
+ /// could this stream contain resync markers
+ int resync_marker;
+ /// time distance of first I -> B, used for interlaced B-frames
+ int t_frame;
+
+ int new_pred;
+ int enhancement_type;
+ int scalability;
+ int use_intra_dc_vlc;
+ /// QP above which the ac VLC should be used for intra dc
+ int intra_dc_threshold;
+
+ /* bug workarounds */
+ int divx_version;
+ int divx_build;
+ int xvid_build;
+ int lavc_build;
+ /// flag for having shown the warning about invalid Divx B-frames
+ int showed_packed_warning;
+ /** does the stream contain the low_delay flag,
+ * used to work around buggy encoders. */
+ int vol_control_parameters;
+ int cplx_estimation_trash_i;
+ int cplx_estimation_trash_p;
+ int cplx_estimation_trash_b;
+} Mpeg4DecContext;
+
+/* dc encoding for MPEG-4 */
extern const uint8_t ff_mpeg4_DCtab_lum[13][2];
extern const uint8_t ff_mpeg4_DCtab_chrom[13][2];
extern const uint16_t ff_mpeg4_intra_vlc[103][2];
+extern const int8_t ff_mpeg4_intra_level[102];
+extern const int8_t ff_mpeg4_intra_run[102];
+
extern RLTable ff_mpeg4_rl_intra;
/* Note this is identical to the intra rvlc except that it is reordered. */
-extern RLTable rvlc_rl_inter;
-extern RLTable rvlc_rl_intra;
+extern RLTable ff_rvlc_rl_inter;
+extern RLTable ff_rvlc_rl_intra;
-extern const uint16_t sprite_trajectory_tab[15][2];
-extern const uint8_t mb_type_b_tab[4][2];
+extern const uint16_t ff_sprite_trajectory_tab[15][2];
+extern const uint8_t ff_mb_type_b_tab[4][2];
/* these matrixes will be permuted for the idct */
extern const int16_t ff_mpeg4_default_intra_matrix[64];
extern const uint8_t ff_mpeg4_c_dc_scale_table[32];
extern const uint16_t ff_mpeg4_resync_prefix[8];
-extern const uint8_t mpeg4_dc_threshold[8];
+extern const uint8_t ff_mpeg4_dc_threshold[8];
-void mpeg4_encode_mb(MpegEncContext *s,
- DCTELEM block[6][64],
- int motion_x, int motion_y);
-void mpeg4_pred_ac(MpegEncContext * s, DCTELEM *block, int n,
- int dir);
-void ff_set_mpeg4_time(MpegEncContext * s);
-void mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
+void ff_mpeg4_encode_mb(MpegEncContext *s,
+ int16_t block[6][64],
+ int motion_x, int motion_y);
+void ff_mpeg4_pred_ac(MpegEncContext *s, int16_t *block, int n,
+ int dir);
+void ff_set_mpeg4_time(MpegEncContext *s);
+void ff_mpeg4_encode_picture_header(MpegEncContext *s, int picture_number);
-int ff_mpeg4_decode_picture_header(MpegEncContext * s, GetBitContext *gb);
+int ff_mpeg4_decode_picture_header(Mpeg4DecContext *ctx, GetBitContext *gb);
void ff_mpeg4_encode_video_packet_header(MpegEncContext *s);
void ff_mpeg4_clean_buffers(MpegEncContext *s);
-void ff_mpeg4_stuffing(PutBitContext * pbc);
+void ff_mpeg4_stuffing(PutBitContext *pbc);
void ff_mpeg4_init_partitions(MpegEncContext *s);
void ff_mpeg4_merge_partitions(MpegEncContext *s);
void ff_clean_mpeg4_qscales(MpegEncContext *s);
-int ff_mpeg4_decode_partitions(MpegEncContext *s);
+int ff_mpeg4_decode_partitions(Mpeg4DecContext *ctx);
int ff_mpeg4_get_video_packet_prefix_length(MpegEncContext *s);
-int mpeg4_decode_video_packet_header(MpegEncContext *s);
+int ff_mpeg4_decode_video_packet_header(Mpeg4DecContext *ctx);
void ff_mpeg4_init_direct_mv(MpegEncContext *s);
+int ff_mpeg4_frame_end(AVCodecContext *avctx, const uint8_t *buf, int buf_size);
/**
- *
* @return the mb_type
*/
int ff_mpeg4_set_direct_mv(MpegEncContext *s, int mx, int my);
-extern uint8_t ff_mpeg4_static_rl_table_store[3][2][2*MAX_RUN + MAX_LEVEL + 3];
-
+extern uint8_t ff_mpeg4_static_rl_table_store[3][2][2 * MAX_RUN + MAX_LEVEL + 3];
#if 0 //3IV1 is quite rare and it slows things down a tiny bit
#define IS_3IV1 s->codec_tag == AV_RL32("3IV1")
#define IS_3IV1 0
#endif
-
/**
- * predicts the dc.
+ * Predict the dc.
* encoding quantized level -> quantized diff
* decoding quantized diff -> quantized level
* @param n block index (0-3 are luma, 4-5 are chroma)
* @param dir_ptr pointer to an integer where the prediction direction will be stored
*/
-static inline int ff_mpeg4_pred_dc(MpegEncContext * s, int n, int level, int *dir_ptr, int encoding)
+static inline int ff_mpeg4_pred_dc(MpegEncContext *s, int n, int level,
+ int *dir_ptr, int encoding)
{
int a, b, c, wrap, pred, scale, ret;
int16_t *dc_val;
/* find prediction */
- if (n < 4) {
+ if (n < 4)
scale = s->y_dc_scale;
- } else {
+ else
scale = s->c_dc_scale;
- }
- if(IS_3IV1)
- scale= 8;
+ if (IS_3IV1)
+ scale = 8;
- wrap= s->block_wrap[n];
+ wrap = s->block_wrap[n];
dc_val = s->dc_val[0] + s->block_index[n];
/* B C
* A X
*/
- a = dc_val[ - 1];
- b = dc_val[ - 1 - wrap];
- c = dc_val[ - wrap];
-
- /* outside slice handling (we can't do that by memset as we need the dc for error resilience) */
- if(s->first_slice_line && n!=3){
- if(n!=2) b=c= 1024;
- if(n!=1 && s->mb_x == s->resync_mb_x) b=a= 1024;
+ a = dc_val[-1];
+ b = dc_val[-1 - wrap];
+ c = dc_val[-wrap];
+
+ /* outside slice handling (we can't do that by memset as we need the
+ * dc for error resilience) */
+ if (s->first_slice_line && n != 3) {
+ if (n != 2)
+ b = c = 1024;
+ if (n != 1 && s->mb_x == s->resync_mb_x)
+ b = a = 1024;
}
- if(s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y+1){
- if(n==0 || n==4 || n==5)
- b=1024;
+ if (s->mb_x == s->resync_mb_x && s->mb_y == s->resync_mb_y + 1) {
+ if (n == 0 || n == 4 || n == 5)
+ b = 1024;
}
if (abs(a - b) < abs(b - c)) {
- pred = c;
+ pred = c;
*dir_ptr = 1; /* top */
} else {
- pred = a;
+ pred = a;
*dir_ptr = 0; /* left */
}
/* we assume pred is positive */
pred = FASTDIV((pred + (scale >> 1)), scale);
- if(encoding){
+ if (encoding) {
ret = level - pred;
- }else{
+ } else {
level += pred;
- ret= level;
- if(s->error_recognition>=3){
- if(level<0){
- av_log(s->avctx, AV_LOG_ERROR, "dc<0 at %dx%d\n", s->mb_x, s->mb_y);
+ ret = level;
+ if (s->avctx->err_recognition & AV_EF_BITSTREAM) {
+ if (level < 0) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "dc<0 at %dx%d\n", s->mb_x, s->mb_y);
return -1;
}
- if(level*scale > 2048 + scale){
- av_log(s->avctx, AV_LOG_ERROR, "dc overflow at %dx%d\n", s->mb_x, s->mb_y);
+ if (level * scale > 2048 + scale) {
+ av_log(s->avctx, AV_LOG_ERROR,
+ "dc overflow at %dx%d\n", s->mb_x, s->mb_y);
return -1;
}
}
}
- level *=scale;
- if(level&(~2047)){
- if(level<0)
- level=0;
- else if(!(s->workaround_bugs&FF_BUG_DC_CLIP))
- level=2047;
+ level *= scale;
+ if (level & (~2047)) {
+ if (level < 0)
+ level = 0;
+ else if (!(s->workaround_bugs & FF_BUG_DC_CLIP))
+ level = 2047;
}
- dc_val[0]= level;
+ dc_val[0] = level;
return ret;
}
-#endif
+
+#endif /* AVCODEC_MPEG4VIDEO_H */
projects / ffmpeg / blobdiff