#include "libavutil/avassert.h"
#include "libavutil/log.h"
#include "libavutil/opt.h"
+#include "libavutil/thread.h"
#include "libavutil/timecode.h"
#include "libavutil/stereo3d.h"
mpeg1_encode_mb_internal(s, block, motion_x, motion_y, 8);
}
-av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
+static av_cold void mpeg12_encode_init_static(void)
{
- static int done = 0;
+ ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
+ ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
- ff_mpeg12_common_init(s);
+ for (int i = 0; i < 64; i++) {
+ mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
+ mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
+ }
- if (!done) {
- int f_code;
- int mv;
- int i;
+ init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
+ init_uni_ac_vlc(&ff_rl_mpeg2, uni_mpeg2_ac_vlc_len);
- done = 1;
- ff_rl_init(&ff_rl_mpeg1, ff_mpeg12_static_rl_table_store[0]);
- ff_rl_init(&ff_rl_mpeg2, ff_mpeg12_static_rl_table_store[1]);
+ /* build unified dc encoding tables */
+ for (int i = -255; i < 256; i++) {
+ int adiff, index;
+ int bits, code;
+ int diff = i;
- for (i = 0; i < 64; i++) {
- mpeg1_max_level[0][i] = ff_rl_mpeg1.max_level[0][i];
- mpeg1_index_run[0][i] = ff_rl_mpeg1.index_run[0][i];
- }
+ adiff = FFABS(diff);
+ if (diff < 0)
+ diff--;
+ index = av_log2(2 * adiff);
- init_uni_ac_vlc(&ff_rl_mpeg1, uni_mpeg1_ac_vlc_len);
- if (s->intra_vlc_format)
- init_uni_ac_vlc(&ff_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 = ff_mpeg12_vlc_dc_lum_bits[index] + index;
- code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
- av_mod_uintp2(diff, index);
- mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
-
- bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
- code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
- av_mod_uintp2(diff, index);
- mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
- }
+ bits = ff_mpeg12_vlc_dc_lum_bits[index] + index;
+ code = (ff_mpeg12_vlc_dc_lum_code[index] << index) +
+ av_mod_uintp2(diff, index);
+ mpeg1_lum_dc_uni[i + 255] = bits + (code << 8);
- for (f_code = 1; f_code <= MAX_FCODE; f_code++)
- for (mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
- int len;
+ bits = ff_mpeg12_vlc_dc_chroma_bits[index] + index;
+ code = (ff_mpeg12_vlc_dc_chroma_code[index] << index) +
+ av_mod_uintp2(diff, index);
+ mpeg1_chr_dc_uni[i + 255] = bits + (code << 8);
+ }
- if (mv == 0) {
- len = ff_mpeg12_mbMotionVectorTable[0][1];
- } else {
- int val, bit_size, code;
-
- bit_size = f_code - 1;
-
- val = mv;
- if (val < 0)
- val = -val;
- val--;
- code = (val >> bit_size) + 1;
- if (code < 17)
- len = ff_mpeg12_mbMotionVectorTable[code][1] +
- 1 + bit_size;
- else
- len = ff_mpeg12_mbMotionVectorTable[16][1] +
- 2 + bit_size;
- }
+ for (int f_code = 1; f_code <= MAX_FCODE; f_code++)
+ for (int mv = -MAX_DMV; mv <= MAX_DMV; mv++) {
+ int len;
- mv_penalty[f_code][mv + MAX_DMV] = len;
+ if (mv == 0) {
+ len = ff_mpeg12_mbMotionVectorTable[0][1];
+ } else {
+ int val, bit_size, code;
+
+ bit_size = f_code - 1;
+
+ val = mv;
+ if (val < 0)
+ val = -val;
+ val--;
+ code = (val >> bit_size) + 1;
+ if (code < 17)
+ len = ff_mpeg12_mbMotionVectorTable[code][1] +
+ 1 + bit_size;
+ else
+ len = ff_mpeg12_mbMotionVectorTable[16][1] +
+ 2 + bit_size;
}
+ mv_penalty[f_code][mv + MAX_DMV] = len;
+ }
+
+
+ for (int f_code = MAX_FCODE; f_code > 0; f_code--)
+ for (int mv = -(8 << f_code); mv < (8 << f_code); mv++)
+ fcode_tab[mv + MAX_MV] = f_code;
+}
+
+av_cold void ff_mpeg1_encode_init(MpegEncContext *s)
+{
+ static AVOnce init_static_once = AV_ONCE_INIT;
+
+ ff_mpeg12_common_init(s);
- 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 == AV_CODEC_ID_MPEG1VIDEO) {
}
s->inter_ac_vlc_length =
s->inter_ac_vlc_last_length = uni_mpeg1_ac_vlc_len;
+
+ ff_thread_once(&init_static_once, mpeg12_encode_init_static);
}
#define OFFSET(x) offsetof(MpegEncContext, x)
#define COMMON_OPTS \
{ "gop_timecode", "MPEG GOP Timecode in hh:mm:ss[:;.]ff format. Overrides timecode_frame_start.", \
OFFSET(tc_opt_str), AV_OPT_TYPE_STRING, {.str=NULL}, 0, 0, VE },\
- { "intra_vlc", "Use MPEG-2 intra VLC table.", \
- OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
{ "drop_frame_timecode", "Timecode is in drop frame format.", \
OFFSET(drop_frame_timecode), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE }, \
{ "scan_offset", "Reserve space for SVCD scan offset user data.", \
static const AVOption mpeg2_options[] = {
COMMON_OPTS
+ { "intra_vlc", "Use MPEG-2 intra VLC table.",
+ OFFSET(intra_vlc_format), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "non_linear_quant", "Use nonlinear quantizer.", OFFSET(q_scale_type), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "alternate_scan", "Enable alternate scantable.", OFFSET(alternate_scan), AV_OPT_TYPE_BOOL, { .i64 = 0 }, 0, 1, VE },
{ "seq_disp_ext", "Write sequence_display_extension blocks.", OFFSET(seq_disp_ext), AV_OPT_TYPE_INT, { .i64 = -1 }, -1, 1, VE, "seq_disp_ext" },
projects / ffmpeg / blobdiff