videolan/ffmpeg
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SVCD scan offset stuff

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Originally committed as revision 2660 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Michael Niedermayer 2004-01-04 00:23:14 +00:00
parent c953e7976e
commit baaf3f467b
4 changed files with 23 additions and 1 deletions
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6
ffmpeg.c
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@ -121,6 +121,7 @@ static int use_aiv = 0;
static int use_umv = 0;
static int use_alt_scan = 0;
static int use_trell = 0;
static int use_scan_offset = 0;
static int do_deinterlace = 0;
static int do_interlace_dct = 0;
static int do_interlace_me = 0;
@ -2399,6 +2400,9 @@ static void opt_output_file(const char *filename)
if (use_trell) {
video_enc->flags |= CODEC_FLAG_TRELLIS_QUANT;
}
if (use_scan_offset) {
video_enc->flags |= CODEC_FLAG_SVCD_SCAN_OFFSET;
}
if (b_frames) {
video_enc->max_b_frames = b_frames;
video_enc->b_frame_strategy = 0;
@ -2906,6 +2910,7 @@ static void opt_target(const char *arg)
video_rc_max_rate = 2516000;
video_rc_min_rate = 0; //1145000;
video_rc_buffer_size = 224*1024*8;
use_scan_offset = 1;
audio_bit_rate = 224000;
audio_sample_rate = 44100;
@ -3034,6 +3039,7 @@ const OptionDef options[] = {
{ "umv", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&use_umv}, "enable Unlimited Motion Vector (h263+)" },
{ "alt", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&use_alt_scan}, "enable alternate scantable (mpeg2)" },
{ "trell", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&use_trell}, "enable trellis quantization" },
{ "scan_offset", OPT_BOOL | OPT_EXPERT | OPT_VIDEO, {(void*)&use_scan_offset}, "enable SVCD Scan Offset placeholder" },
{ "intra_matrix", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_intra_matrix}, "specify intra matrix coeffs", "matrix" },
{ "inter_matrix", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_inter_matrix}, "specify inter matrix coeffs", "matrix" },
{ "top", HAS_ARG | OPT_EXPERT | OPT_VIDEO, {(void*)opt_top_field_first}, "top=1/bottom=0/auto=-1 field first", "" },

1
libavcodec/avcodec.h
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@ -267,6 +267,7 @@ static const __attribute__((unused)) int Motion_Est_QTab[] =
#define CODEC_FLAG_LOOP_FILTER 0x00000800 ///< loop filter
#define CODEC_FLAG_H263P_SLICE_STRUCT 0x10000000
#define CODEC_FLAG_INTERLACED_ME 0x20000000 ///< interlaced motion estimation
#define CODEC_FLAG_SVCD_SCAN_OFFSET 0x40000000 ///< will reserve space for SVCD scan offset user data
/* Unsupported options :
* Syntax Arithmetic coding (SAC)
* Reference Picture Selection

10
libavcodec/mpeg12.c
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@ -473,6 +473,14 @@ void mpeg1_encode_picture_header(MpegEncContext *s, int picture_number)
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);
@ -1809,7 +1817,7 @@ static int mpeg1_decode_picture(AVCodecContext *avctx,
static void mpeg_decode_sequence_extension(MpegEncContext *s)
{
int horiz_size_ext, vert_size_ext;
int bit_rate_ext, vbv_buf_ext;
int bit_rate_ext;
int frame_rate_ext_n, frame_rate_ext_d;
int level, profile;

7
libavcodec/mpeg12data.h
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@ -433,3 +433,10 @@ static const AVRational mpeg2_aspect[16]={
{0,1},
};
static const uint8_t svcd_scan_offset_placeholder[14]={
0x10, 0x0E,
0x00, 0x80, 0x81,
0x00, 0x80, 0x81,
0xff, 0xff, 0xff,
0xff, 0xff, 0xff,
};