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ffmpeg.wasm-core
Commit 3ab5b8cc authored by Fabrice Bellard's avatar Fabrice Bellard
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interlaced DCT support for MPEG2 encoding 

Originally committed as revision 2591 to svn://svn.ffmpeg.org/ffmpeg/trunk
parent db9b1b5e
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Showing with 52 additions and 30 deletions
libavcodec/mpeg12.c
View file @ 3ab5b8cc
......@@ -278,7 +278,7 @@ static void mpeg1_encode_sequence_header(MpegEncContext *s)
put_bits(&s->pb, 1, 0); //esc
put_bits(&s->pb, 3, 4); //profile
put_bits(&s->pb, 4, 8); //level
put_bits(&s->pb, 1, s->progressive_sequence=1);
put_bits(&s->pb, 1, s->progressive_sequence);
put_bits(&s->pb, 2, 1); //chroma format 4:2:0
put_bits(&s->pb, 2, 0); //horizontal size ext
put_bits(&s->pb, 2, 0); //vertical size ext
......@@ -429,7 +429,8 @@ void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
}
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
......@@ -448,14 +449,19 @@ void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
put_bits(&s->pb, 2, s->intra_dc_precision);
put_bits(&s->pb, 2, s->picture_structure= PICT_FRAME);
put_bits(&s->pb, 1, s->top_field_first);
put_bits(&s->pb, 1, s->frame_pred_frame_dct= 1);
/* 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);
put_bits(&s->pb, 1, s->chroma_420_type=1);
put_bits(&s->pb, 1, s->progressive_frame=1);
s->progressive_frame = s->progressive_sequence;
put_bits(&s->pb, 1, s->progressive_frame);
put_bits(&s->pb, 1, 0); //composite_display_flag
}
......@@ -463,6 +469,17 @@ void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
ff_mpeg1_encode_slice_header(s);
}
static inline void put_mb_modes(MpegEncContext *s, int n, int bits,
int has_mv)
{
put_bits(&s->pb, n, bits);
if (!s->frame_pred_frame_dct) {
if (has_mv)
put_bits(&s->pb, 2, 2); /* motion_type: frame */
put_bits(&s->pb, 1, s->interlaced_dct);
}
}
void mpeg1_encode_mb(MpegEncContext *s,
DCTELEM block[6][64],
int motion_x, int motion_y)
......@@ -498,20 +515,20 @@ void mpeg1_encode_mb(MpegEncContext *s,
if (s->pict_type == I_TYPE) {
if(s->dquant && cbp){
put_bits(&s->pb, 2, 1); /* macroblock_type : macroblock_quant = 1 */
put_mb_modes(s, 2, 1, 0); /* macroblock_type : macroblock_quant = 1 */
put_bits(&s->pb, 5, s->qscale);
}else{
put_bits(&s->pb, 1, 1); /* macroblock_type : macroblock_quant = 0 */
put_mb_modes(s, 1, 1, 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_bits(&s->pb, 6, 0x01);
put_mb_modes(s, 6, 0x01, 0);
put_bits(&s->pb, 5, s->qscale);
}else{
put_bits(&s->pb, 5, 0x03);
put_mb_modes(s, 5, 0x03, 0);
s->qscale -= s->dquant;
}
s->misc_bits+= get_bits_diff(s);
......@@ -522,19 +539,19 @@ void mpeg1_encode_mb(MpegEncContext *s,
if (cbp != 0) {
if (motion_x == 0 && motion_y == 0) {
if(s->dquant){
put_bits(&s->pb, 5, 1); /* macroblock_pattern & quant */
put_mb_modes(s, 5, 1, 0); /* macroblock_pattern & quant */
put_bits(&s->pb, 5, s->qscale);
}else{
put_bits(&s->pb, 2, 1); /* macroblock_pattern only */
put_mb_modes(s, 2, 1, 0); /* macroblock_pattern only */
}
s->misc_bits+= get_bits_diff(s);
put_bits(&s->pb, mbPatTable[cbp - 1][1], mbPatTable[cbp - 1][0]);
} else {
if(s->dquant){
put_bits(&s->pb, 5, 2); /* motion + cbp */
put_mb_modes(s, 5, 2, 1); /* motion + cbp */
put_bits(&s->pb, 5, s->qscale);
}else{
put_bits(&s->pb, 1, 1); /* motion + cbp */
put_mb_modes(s, 1, 1, 1); /* 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
......@@ -544,6 +561,8 @@ void mpeg1_encode_mb(MpegEncContext *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 */
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;
......@@ -556,13 +575,12 @@ void mpeg1_encode_mb(MpegEncContext *s,
{ // 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);
if (s->dquant) {
put_mb_modes(s, 5, 2, 1);
put_bits(&s->pb, 5, s->qscale);
}
else // Without QScale
put_bits(&s->pb, 2, 3);
} else {
put_mb_modes(s, 2, 3, 1);
}
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);
......@@ -575,13 +593,12 @@ void mpeg1_encode_mb(MpegEncContext *s,
}
else if (s->mv_dir == MV_DIR_BACKWARD)
{ // Backward motion
if (s->dquant)
{ // With QScale
put_bits(&s->pb, 6, 2);
if (s->dquant) {
put_mb_modes(s, 6, 2, 1);
put_bits(&s->pb, 5, s->qscale);
}
else // Without QScale
put_bits(&s->pb, 3, 3);
} else {
put_mb_modes(s, 3, 3, 1);
}
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);
......@@ -591,13 +608,12 @@ void mpeg1_encode_mb(MpegEncContext *s,
}
else if (s->mv_dir == MV_DIR_FORWARD)
{ // Forward motion
if (s->dquant)
{ // With QScale
put_bits(&s->pb, 6, 3);
if (s->dquant) {
put_mb_modes(s, 6, 3, 1);
put_bits(&s->pb, 5, s->qscale);
}
else // Without QScale
put_bits(&s->pb, 4, 3);
} else {
put_mb_modes(s, 4, 3, 1);
}
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);
......@@ -611,6 +627,8 @@ void mpeg1_encode_mb(MpegEncContext *s,
if (s->mv_dir == (MV_DIR_FORWARD | MV_DIR_BACKWARD))
{ // Bi-directional motion
put_bits(&s->pb, 2, 2); /* backward & forward motion */
if (!s->frame_pred_frame_dct)
put_bits(&s->pb, 2, 2); /* motion_type: frame */
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);
......@@ -621,6 +639,8 @@ void mpeg1_encode_mb(MpegEncContext *s,
else if (s->mv_dir == MV_DIR_BACKWARD)
{ // Backward motion
put_bits(&s->pb, 3, 2); /* backward motion only */
if (!s->frame_pred_frame_dct)
put_bits(&s->pb, 2, 2); /* motion_type: frame */
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++;
......@@ -628,6 +648,8 @@ void mpeg1_encode_mb(MpegEncContext *s,
else if (s->mv_dir == MV_DIR_FORWARD)
{ // Forward motion
put_bits(&s->pb, 4, 2); /* forward motion only */
if (!s->frame_pred_frame_dct)
put_bits(&s->pb, 2, 2); /* motion_type: frame */
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++;
......
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