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Diffstat (limited to 'src/libffmpeg/libavcodec/mpeg12.c')
-rw-r--r--src/libffmpeg/libavcodec/mpeg12.c303
1 files changed, 217 insertions, 86 deletions
diff --git a/src/libffmpeg/libavcodec/mpeg12.c b/src/libffmpeg/libavcodec/mpeg12.c
index e39356c9d..493d1a445 100644
--- a/src/libffmpeg/libavcodec/mpeg12.c
+++ b/src/libffmpeg/libavcodec/mpeg12.c
@@ -249,7 +249,7 @@ static void mpeg1_encode_sequence_header(MpegEncContext *s)
{
unsigned int vbv_buffer_size;
unsigned int fps, v;
- int n, i;
+ int i;
uint64_t time_code;
float best_aspect_error= 1E10;
float aspect_ratio= av_q2d(s->avctx->sample_aspect_ratio);
@@ -365,8 +365,14 @@ static inline void encode_mb_skip_run(MpegEncContext *s, int run){
static void common_init(MpegEncContext *s)
{
+int i;
+
s->y_dc_scale_table=
s->c_dc_scale_table= ff_mpeg1_dc_scale_table;
+
+ if(!s->encoding)
+ for(i=0;i<64;i++)
+ s->dsp.idct_permutation[i]=i;
}
void ff_mpeg1_clean_buffers(MpegEncContext *s){
@@ -500,8 +506,9 @@ void mpeg1_encode_mb(MpegEncContext *s,
cbp |= 1 << (5 - i);
}
- if (cbp == 0 && !first_mb && (mb_x != s->mb_width - 1 || (mb_y != s->mb_height - 1 && s->codec_id == CODEC_ID_MPEG1VIDEO)) &&
- ((s->pict_type == P_TYPE && s->mv_type == MV_TYPE_16X16 && (motion_x | motion_y) == 0) ||
+ 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++;
@@ -798,7 +805,7 @@ void ff_mpeg1_encode_init(MpegEncContext *s)
else{
int val, bit_size, range, code;
- bit_size = s->f_code - 1;
+ bit_size = f_code - 1;
range = 1 << bit_size;
val=mv;
@@ -955,7 +962,7 @@ static VLC mb_ptype_vlc;
static VLC mb_btype_vlc;
static VLC mb_pat_vlc;
-static void init_vlcs()
+static void init_vlcs(void)
{
static int done = 0;
@@ -1754,11 +1761,17 @@ typedef struct Mpeg1Context {
int repeat_field; /* true if we must repeat the field */
AVPanScan pan_scan; /** some temporary storage for the panscan */
int slice_count;
+ int swap_uv;//indicate VCR2
+ int save_aspect_info;
+
} Mpeg1Context;
static int mpeg_decode_init(AVCodecContext *avctx)
{
Mpeg1Context *s = avctx->priv_data;
+ MpegEncContext *s2 = &s->mpeg_enc_ctx;
+
+ MPV_decode_defaults(s2);
s->mpeg_enc_ctx.avctx= avctx;
s->mpeg_enc_ctx.flags= avctx->flags;
@@ -1773,6 +1786,122 @@ static int mpeg_decode_init(AVCodecContext *avctx)
return 0;
}
+static void quant_matrix_rebuild(uint16_t *matrix, const uint8_t *old_perm,
+ const uint8_t *new_perm){
+uint16_t temp_matrix[64];
+int i;
+
+ memcpy(temp_matrix,matrix,64*sizeof(uint16_t));
+
+ for(i=0;i<64;i++){
+ matrix[new_perm[i]] = temp_matrix[old_perm[i]];
+ }
+}
+
+//Call this function when we know all parameters
+//it may be called in different places for mpeg1 and mpeg2
+static int mpeg_decode_postinit(AVCodecContext *avctx){
+Mpeg1Context *s1 = avctx->priv_data;
+MpegEncContext *s = &s1->mpeg_enc_ctx;
+uint8_t old_permutation[64];
+
+
+ if (
+ (s1->mpeg_enc_ctx_allocated == 0)||
+ avctx->width != s->width ||
+ avctx->height != s->height||
+// s1->save_aspect_info != avctx->aspect_ratio_info||
+ 0)
+ {
+
+ if (s1->mpeg_enc_ctx_allocated) {
+ MPV_common_end(s);
+ }
+
+ if( (s->width == 0 )||(s->height == 0))
+ return -2;
+
+ avctx->width = s->width;
+ avctx->height = s->height;
+ avctx->bit_rate = s->bit_rate;
+ s1->save_aspect_info = s->aspect_ratio_info;
+
+ //low_delay may be forced, in this case we will have B frames
+ //that behave like P frames
+ avctx->has_b_frames = !(s->low_delay);
+
+ if(avctx->sub_id==1){//s->codec_id==avctx->codec_id==CODEC_ID
+ //mpeg1 fps
+ avctx->frame_rate = frame_rate_tab[s->frame_rate_index].num;
+ avctx->frame_rate_base= 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);
+
+ }else{//mpeg2
+ //mpeg2 fps
+ av_reduce(
+ &s->avctx->frame_rate,
+ &s->avctx->frame_rate_base,
+ frame_rate_tab[s->frame_rate_index].num * (s->frame_rate_ext_n+1),
+ frame_rate_tab[s->frame_rate_index].den * (s->frame_rate_ext_d+1),
+ 1<<30);
+ //mpeg2 aspect
+ if(s->aspect_ratio_info > 1){
+ 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],
+ (AVRational){s->width, s->height}
+ );
+ }else{
+ s->avctx->sample_aspect_ratio=
+ av_div_q(
+ 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];
+ }
+ }//mpeg2
+
+ if(avctx->xvmc_acceleration){
+ avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
+ }else{
+ if(s->chroma_format < 2){
+ avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
+ }else
+ if(s->chroma_format == 2){
+ avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_422);
+ }else
+ if(s->chroma_format > 2){
+ avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_444);
+ }
+ }
+ //until then pix_fmt may be changed right after codec init
+ if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
+ if( avctx->idct_algo == FF_IDCT_AUTO )
+ avctx->idct_algo = FF_IDCT_SIMPLE;
+
+ //quantization matrixes may need reordering
+ //if dct permutation is changed
+ memcpy(old_permutation,s->dsp.idct_permutation,64*sizeof(uint8_t));
+
+ if (MPV_common_init(s) < 0)
+ return -2;
+
+ quant_matrix_rebuild(s->intra_matrix, old_permutation,s->dsp.idct_permutation);
+ quant_matrix_rebuild(s->inter_matrix, old_permutation,s->dsp.idct_permutation);
+ quant_matrix_rebuild(s->chroma_intra_matrix,old_permutation,s->dsp.idct_permutation);
+ quant_matrix_rebuild(s->chroma_inter_matrix,old_permutation,s->dsp.idct_permutation);
+
+ s1->mpeg_enc_ctx_allocated = 1;
+ }
+ 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(const uint8_t **pbuf_ptr, const uint8_t *buf_end)
@@ -1807,6 +1936,9 @@ static int mpeg1_decode_picture(AVCodecContext *avctx,
MpegEncContext *s = &s1->mpeg_enc_ctx;
int ref, f_code, vbv_delay;
+ if(mpeg_decode_postinit(s->avctx) < 0)
+ return -2;
+
init_get_bits(&s->gb, buf, buf_size*8);
ref = get_bits(&s->gb, 10); /* temporal ref */
@@ -1845,7 +1977,6 @@ static void mpeg_decode_sequence_extension(MpegEncContext *s)
{
int horiz_size_ext, vert_size_ext;
int bit_rate_ext;
- int frame_rate_ext_n, frame_rate_ext_d;
int level, profile;
skip_bits(&s->gb, 1); /* profil and level esc*/
@@ -1865,32 +1996,17 @@ static void mpeg_decode_sequence_extension(MpegEncContext *s)
s->low_delay = get_bits1(&s->gb);
if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
- frame_rate_ext_n = get_bits(&s->gb, 2);
- frame_rate_ext_d = get_bits(&s->gb, 5);
- av_reduce(
- &s->avctx->frame_rate,
- &s->avctx->frame_rate_base,
- frame_rate_tab[s->frame_rate_index].num * (frame_rate_ext_n+1),
- frame_rate_tab[s->frame_rate_index].den * (frame_rate_ext_d+1),
- 1<<30);
+ s->frame_rate_ext_n = get_bits(&s->gb, 2);
+ s->frame_rate_ext_d = get_bits(&s->gb, 5);
dprintf("sequence extension\n");
s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG2VIDEO;
s->avctx->sub_id = 2; /* indicates mpeg2 found */
- if(s->aspect_ratio_info <= 1)
- s->avctx->sample_aspect_ratio= mpeg2_aspect[s->aspect_ratio_info];
- else{
- s->avctx->sample_aspect_ratio=
- av_div_q(
- mpeg2_aspect[s->aspect_ratio_info],
- (AVRational){s->width, s->height}
- );
- }
-
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_DEBUG, "profile: %d, level: %d vbv buffer: %d, bitrate:%d\n",
profile, level, s->avctx->rc_buffer_size, s->bit_rate);
+
}
static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
@@ -1912,14 +2028,7 @@ static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
s1->pan_scan.width= 16*w;
s1->pan_scan.height=16*h;
-
- if(s->aspect_ratio_info > 1)
- s->avctx->sample_aspect_ratio=
- av_div_q(
- mpeg2_aspect[s->aspect_ratio_info],
- (AVRational){w, h}
- );
-
+
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
av_log(s->avctx, AV_LOG_DEBUG, "sde w:%d, h:%d\n", w, h);
}
@@ -1927,9 +2036,23 @@ static void mpeg_decode_sequence_display_extension(Mpeg1Context *s1)
static void mpeg_decode_picture_display_extension(Mpeg1Context *s1)
{
MpegEncContext *s= &s1->mpeg_enc_ctx;
- int i;
-
- for(i=0; i<1; i++){ //FIXME count
+ int i,nofco;
+
+ nofco = 1;
+ if(s->progressive_sequence){
+ if(s->repeat_first_field){
+ nofco++;
+ if(s->top_field_first)
+ nofco++;
+ }
+ }else{
+ if(s->picture_structure == PICT_FRAME){
+ nofco++;
+ if(s->repeat_first_field)
+ nofco++;
+ }
+ }
+ for(i=0; i<nofco; i++){
s1->pan_scan.position[i][0]= get_sbits(&s->gb, 16);
skip_bits(&s->gb, 1); //marker
s1->pan_scan.position[i][1]= get_sbits(&s->gb, 16);
@@ -2134,8 +2257,8 @@ static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
s->resync_mb_x=
s->resync_mb_y= -1;
- if (mb_y >= s->mb_height){
- av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", s->mb_y, s->mb_height);
+ if (mb_y<<field_pic >= s->mb_height){
+ av_log(s->avctx, AV_LOG_ERROR, "slice below image (%d >= %d)\n", mb_y, s->mb_height);
return -1;
}
@@ -2208,8 +2331,8 @@ static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
return -1;
if(s->current_picture.motion_val[0] && !s->encoding){ //note motion_val is normally NULL unless we want to extract the MVs
- const int wrap = field_pic ? 2*s->block_wrap[0] : s->block_wrap[0];
- int xy = s->mb_x*2 + 1 + (s->mb_y*2 +1)*wrap;
+ const int wrap = field_pic ? 2*s->b8_stride : s->b8_stride;
+ int xy = s->mb_x*2 + s->mb_y*2*wrap;
int motion_x, motion_y, dir, i;
if(field_pic && !s->first_field)
xy += wrap/2;
@@ -2218,18 +2341,20 @@ static int mpeg_decode_slice(Mpeg1Context *s1, int mb_y,
for(dir=0; dir<2; dir++){
if (s->mb_intra || (dir==1 && s->pict_type != B_TYPE)) {
motion_x = motion_y = 0;
- }else if (s->mv_type == MV_TYPE_16X16){
+ }else if (s->mv_type == MV_TYPE_16X16 || (s->mv_type == MV_TYPE_FIELD && field_pic)){
motion_x = s->mv[dir][0][0];
motion_y = s->mv[dir][0][1];
} else /*if ((s->mv_type == MV_TYPE_FIELD) || (s->mv_type == MV_TYPE_16X8))*/ {
motion_x = s->mv[dir][i][0];
motion_y = s->mv[dir][i][1];
}
-
+
s->current_picture.motion_val[dir][xy ][0] = motion_x;
s->current_picture.motion_val[dir][xy ][1] = motion_y;
s->current_picture.motion_val[dir][xy + 1][0] = motion_x;
s->current_picture.motion_val[dir][xy + 1][1] = motion_y;
+ s->current_picture.ref_index [dir][xy ]=
+ s->current_picture.ref_index [dir][xy + 1]= s->field_select[dir][i];
}
xy += wrap;
}
@@ -2379,59 +2504,27 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
{
Mpeg1Context *s1 = avctx->priv_data;
MpegEncContext *s = &s1->mpeg_enc_ctx;
- int width, height, i, v, j;
- float aspect;
+ int width,height;
+ int i, v, j;
init_get_bits(&s->gb, buf, buf_size*8);
width = get_bits(&s->gb, 12);
height = get_bits(&s->gb, 12);
+ if (width <= 0 || height <= 0 ||
+ (width % 2) != 0 || (height % 2) != 0)
+ return -1;
s->aspect_ratio_info= get_bits(&s->gb, 4);
if (s->aspect_ratio_info == 0)
return -1;
- aspect= 1.0/mpeg1_aspect[s->aspect_ratio_info];
- avctx->sample_aspect_ratio= av_d2q(aspect, 255);
-
s->frame_rate_index = get_bits(&s->gb, 4);
if (s->frame_rate_index == 0 || s->frame_rate_index > 13)
return -1;
s->bit_rate = get_bits(&s->gb, 18) * 400;
if (get_bits1(&s->gb) == 0) /* marker */
return -1;
- if (width <= 0 || height <= 0 ||
- (width % 2) != 0 || (height % 2) != 0)
- return -1;
- if (width != s->width ||
- height != s->height) {
- /* start new mpeg1 context decoding */
- s->out_format = FMT_MPEG1;
- if (s1->mpeg_enc_ctx_allocated) {
- MPV_common_end(s);
- }
- s->width = width;
- s->height = height;
- avctx->has_b_frames= 1;
- avctx->width = width;
- avctx->height = height;
- avctx->frame_rate = frame_rate_tab[s->frame_rate_index].num;
- avctx->frame_rate_base= frame_rate_tab[s->frame_rate_index].den;
- avctx->bit_rate = s->bit_rate;
-
- if(avctx->xvmc_acceleration){
- avctx->pix_fmt = avctx->get_format(avctx,pixfmt_xvmc_mpg2_420);
- }else{
- avctx->pix_fmt = avctx->get_format(avctx,pixfmt_yuv_420);
- }
-
- if( avctx->pix_fmt == PIX_FMT_XVMC_MPEG2_IDCT )
- if( avctx->idct_algo == FF_IDCT_AUTO )
- avctx->idct_algo = FF_IDCT_SIMPLE;
-
- if (MPV_common_init(s) < 0)
- return -1;
- s1->mpeg_enc_ctx_allocated = 1;
- s->swap_uv = 0;//just in case vcr2 and mpeg2 stream have been concatinated
- }
+ s->width = width;
+ s->height = height;
s->avctx->rc_buffer_size= get_bits(&s->gb, 10) * 1024*16;
skip_bits(&s->gb, 1);
@@ -2444,19 +2537,21 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
av_log(s->avctx, AV_LOG_ERROR, "intra matrix damaged\n");
return -1;
}
- j = s->intra_scantable.permutated[i];
+ j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
s->intra_matrix[j] = v;
s->chroma_intra_matrix[j] = v;
}
#ifdef DEBUG
+/*
dprintf("intra matrix present\n");
for(i=0;i<64;i++)
- dprintf(" %d", s->intra_matrix[s->intra_scantable.permutated[i]]);
+ dprintf(" %d", s->intra_matrix[s->dsp.idct_permutation[i]);
printf("\n");
+*/
#endif
} else {
for(i=0;i<64;i++) {
- int j= s->dsp.idct_permutation[i];
+ j = s->dsp.idct_permutation[i];
v = ff_mpeg1_default_intra_matrix[i];
s->intra_matrix[j] = v;
s->chroma_intra_matrix[j] = v;
@@ -2469,15 +2564,17 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
av_log(s->avctx, AV_LOG_ERROR, "inter matrix damaged\n");
return -1;
}
- j = s->intra_scantable.permutated[i];
+ j = s->dsp.idct_permutation[ ff_zigzag_direct[i] ];
s->inter_matrix[j] = v;
s->chroma_inter_matrix[j] = v;
}
#ifdef DEBUG
+/*
dprintf("non intra matrix present\n");
for(i=0;i<64;i++)
- dprintf(" %d", s->inter_matrix[s->intra_scantable.permutated[i]]);
+ dprintf(" %d", s->inter_matrix[s->dsp.idct_permutation[i]);
printf("\n");
+*/
#endif
} else {
for(i=0;i<64;i++) {
@@ -2501,6 +2598,8 @@ static int mpeg1_decode_sequence(AVCodecContext *avctx,
s->chroma_format = 1;
s->codec_id= s->avctx->codec_id= CODEC_ID_MPEG1VIDEO;
avctx->sub_id = 1; /* indicates mpeg1 */
+ s->out_format = FMT_MPEG1;
+ s->swap_uv = 0;//AFAIK VCR2 don't have SEQ_HEADER
if(s->flags & CODEC_FLAG_LOW_DELAY) s->low_delay=1;
if(s->avctx->debug & FF_DEBUG_PICT_INFO)
@@ -2593,6 +2692,36 @@ static void mpeg_decode_user_data(AVCodecContext *avctx,
}
}
+static void mpeg_decode_gop(AVCodecContext *avctx,
+ const uint8_t *buf, int buf_size){
+ Mpeg1Context *s1 = avctx->priv_data;
+ MpegEncContext *s = &s1->mpeg_enc_ctx;
+
+ int drop_frame_flag;
+ int time_code_hours, time_code_minutes;
+ int time_code_seconds, time_code_pictures;
+ int broken_link;
+
+ init_get_bits(&s->gb, buf, buf_size*8);
+
+ drop_frame_flag = get_bits1(&s->gb);
+
+ time_code_hours=get_bits(&s->gb,5);
+ time_code_minutes = get_bits(&s->gb,6);
+ skip_bits1(&s->gb);//marker bit
+ time_code_seconds = get_bits(&s->gb,6);
+ time_code_pictures = get_bits(&s->gb,6);
+
+ /*broken_link indicate that after editing the
+ reference frames of the first B-Frames after GOP I-Frame
+ are missing (open gop)*/
+ broken_link = get_bits1(&s->gb);
+
+ if(s->avctx->debug & FF_DEBUG_PICT_INFO)
+ av_log(s->avctx, AV_LOG_DEBUG, "GOP (%2d:%02d:%02d.[%02d]) broken_link=%d\n",
+ time_code_hours, time_code_minutes, time_code_seconds,
+ time_code_pictures, broken_link);
+}
/**
* finds the end of the current frame in the bitstream.
* @return the position of the first byte of the next frame, or -1
@@ -2706,7 +2835,7 @@ static int mpeg_decode_frame(AVCodecContext *avctx,
input_size = buf_end - buf_ptr;
if(avctx->debug & FF_DEBUG_STARTCODE){
- av_log(avctx, AV_LOG_DEBUG, "%3X at %d left %d\n", start_code, buf_ptr-buf, input_size);
+ av_log(avctx, AV_LOG_DEBUG, "%3X at %zd left %d\n", start_code, buf_ptr-buf, input_size);
}
/* prepare data for next start code */
@@ -2731,6 +2860,8 @@ static int mpeg_decode_frame(AVCodecContext *avctx,
break;
case GOP_START_CODE:
s2->first_field=0;
+ mpeg_decode_gop(avctx,
+ buf_ptr, input_size);
break;
default:
if (start_code >= SLICE_MIN_START_CODE &&
generated by cgit v1.2.3 (git 2.25.1) at 2025-04-26 17:42:02 +0000