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-rw-r--r--demux/mpeg_hdr.c539
1 files changed, 0 insertions, 539 deletions
diff --git a/demux/mpeg_hdr.c b/demux/mpeg_hdr.c
deleted file mode 100644
index fcc4a33ecc..0000000000
--- a/demux/mpeg_hdr.c
+++ /dev/null
@@ -1,539 +0,0 @@
-/*
- * based on libmpeg2/header.c by Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
- *
- * This file is part of MPlayer.
- *
- * MPlayer is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * MPlayer 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 General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License along
- * with MPlayer; if not, write to the Free Software Foundation, Inc.,
- * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
- */
-
-#include <inttypes.h>
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-
-#include "config.h"
-#include "mpeg_hdr.h"
-#include "libavutil/attributes.h"
-#include "core/mp_msg.h"
-
-static float frameratecode2framerate[16] = {
- 0,
- // Official mpeg1/2 framerates: (1-8)
- 24000.0/1001, 24,25,
- 30000.0/1001, 30,50,
- 60000.0/1001, 60,
- // Xing's 15fps: (9)
- 15,
- // libmpeg3's "Unofficial economy rates": (10-13)
- 5,10,12,15,
- // some invalid ones: (14-15)
- 0,0
-};
-
-
-int mp_header_process_sequence_header (mp_mpeg_header_t * picture, const unsigned char * buffer)
-{
- int height;
-
- if ((buffer[6] & 0x20) != 0x20){
- fprintf(stderr, "missing marker bit!\n");
- return 1; /* missing marker_bit */
- }
-
- height = (buffer[0] << 16) | (buffer[1] << 8) | buffer[2];
-
- picture->display_picture_width = height >> 12;
- picture->display_picture_height = height & 0xfff;
-
- picture->aspect_ratio_information = buffer[3] >> 4;
- picture->frame_rate_code = buffer[3] & 15;
- picture->fps=frameratecode2framerate[picture->frame_rate_code];
- picture->bitrate = (buffer[4]<<10)|(buffer[5]<<2)|(buffer[6]>>6);
- picture->mpeg1 = 1;
- picture->picture_structure = 3; //FRAME_PICTURE;
- picture->display_time=100;
- picture->frame_rate_extension_n = 1;
- picture->frame_rate_extension_d = 1;
- return 0;
-}
-
-static int header_process_sequence_extension (mp_mpeg_header_t * picture,
- unsigned char * buffer)
-{
- /* check chroma format, size extensions, marker bit */
-
- if ( ((buffer[1] & 0x06) == 0x00) ||
- ((buffer[1] & 0x01) != 0x00) || (buffer[2] & 0xe0) ||
- ((buffer[3] & 0x01) != 0x01) )
- return 1;
-
- picture->progressive_sequence = (buffer[1] >> 3) & 1;
- picture->frame_rate_extension_n = ((buffer[5] >> 5) & 3) + 1;
- picture->frame_rate_extension_d = (buffer[5] & 0x1f) + 1;
-
- picture->mpeg1 = 0;
- return 0;
-}
-
-static int header_process_picture_coding_extension (mp_mpeg_header_t * picture, unsigned char * buffer)
-{
- picture->picture_structure = buffer[2] & 3;
- picture->top_field_first = buffer[3] >> 7;
- picture->repeat_first_field = (buffer[3] >> 1) & 1;
- picture->progressive_frame = buffer[4] >> 7;
-
- // repeat_first implementation by A'rpi/ESP-team, based on libmpeg3:
- picture->display_time=100;
- if(picture->repeat_first_field){
- if(picture->progressive_sequence){
- if(picture->top_field_first)
- picture->display_time+=200;
- else
- picture->display_time+=100;
- } else
- if(picture->progressive_frame){
- picture->display_time+=50;
- }
- }
- //temopral hack. We calc time on every field, so if we have 2 fields
- // interlaced we'll end with double time for 1 frame
- if( picture->picture_structure!=3 ) picture->display_time/=2;
- return 0;
-}
-
-int mp_header_process_extension (mp_mpeg_header_t * picture, unsigned char * buffer)
-{
- switch (buffer[0] & 0xf0) {
- case 0x10: /* sequence extension */
- return header_process_sequence_extension (picture, buffer);
- case 0x80: /* picture coding extension */
- return header_process_picture_coding_extension (picture, buffer);
- }
- return 0;
-}
-
-float mpeg12_aspect_info(mp_mpeg_header_t *picture)
-{
- float aspect = 0.0;
-
- switch(picture->aspect_ratio_information) {
- case 2: // PAL/NTSC SVCD/DVD 4:3
- case 8: // PAL VCD 4:3
- case 12: // NTSC VCD 4:3
- aspect=4.0/3.0;
- break;
- case 3: // PAL/NTSC Widescreen SVCD/DVD 16:9
- case 6: // (PAL?)/NTSC Widescreen SVCD 16:9
- aspect=16.0/9.0;
- break;
- case 4: // according to ISO-138182-2 Table 6.3
- aspect=2.21;
- break;
- case 1: // VGA 1:1 - do not prescale
- case 9: // Movie Type ??? / 640x480
- aspect=0.0;
- break;
- default:
- mp_msg(MSGT_DECVIDEO,MSGL_ERR,"Detected unknown aspect_ratio_information in mpeg sequence header.\n"
- "Please report the aspect value (%i) along with the movie type (VGA,PAL,NTSC,"
- "SECAM) and the movie resolution (720x576,352x240,480x480,...) to the MPlayer"
- " developers, so that we can add support for it!\nAssuming 1:1 aspect for now.\n",
- picture->aspect_ratio_information);
- }
-
- return aspect;
-}
-
-//MPEG4 HEADERS
-unsigned char mp_getbits(unsigned char *buffer, unsigned int from, unsigned char len)
-{
- unsigned int n;
- unsigned char m, u, l, y;
-
- n = from / 8;
- m = from % 8;
- u = 8 - m;
- l = (len > u ? len - u : 0);
-
- y = (buffer[n] << m);
- if(8 > len)
- y >>= (8-len);
- if(l)
- y |= (buffer[n+1] >> (8-l));
-
- //fprintf(stderr, "GETBITS(%d -> %d): bytes=0x%x 0x%x, n=%d, m=%d, l=%d, u=%d, Y=%d\n",
- // from, (int) len, (int) buffer[n],(int) buffer[n+1], n, (int) m, (int) l, (int) u, (int) y);
- return y;
-}
-
-static inline unsigned int mp_getbits16(unsigned char *buffer, unsigned int from, unsigned char len)
-{
- if(len > 8)
- return (mp_getbits(buffer, from, len - 8) << 8) | mp_getbits(buffer, from + len - 8, 8);
- else
- return mp_getbits(buffer, from, len);
-}
-
-#define getbits mp_getbits
-#define getbits16 mp_getbits16
-
-static int read_timeinc(mp_mpeg_header_t * picture, unsigned char * buffer, int n)
-{
- if(picture->timeinc_bits > 8) {
- picture->timeinc_unit = getbits(buffer, n, picture->timeinc_bits - 8) << 8;
- n += picture->timeinc_bits - 8;
- picture->timeinc_unit |= getbits(buffer, n, 8);
- n += 8;
- } else {
- picture->timeinc_unit = getbits(buffer, n, picture->timeinc_bits);
- n += picture->timeinc_bits;
- }
- //fprintf(stderr, "TIMEINC2: %d, bits: %d\n", picture->timeinc_unit, picture->timeinc_bits);
- return n;
-}
-
-int mp4_header_process_vol(mp_mpeg_header_t * picture, unsigned char * buffer)
-{
- unsigned int n, aspect=0, aspectw av_unused=0, aspecth av_unused=0, x=1, v;
-
- //begins with 0x0000012x
- picture->fps = 0;
- picture->timeinc_bits = picture->timeinc_resolution = picture->timeinc_unit = 0;
- n = 9;
- if(getbits(buffer, n, 1))
- n += 7;
- n++;
- aspect=getbits(buffer, n, 4);
- n += 4;
- if(aspect == 0x0f) {
- aspectw = getbits(buffer, n, 8);
- n += 8;
- aspecth = getbits(buffer, n, 8);
- n += 8;
- }
-
- if(getbits(buffer, n, 1)) {
- n += 4;
- if(getbits(buffer, n, 1))
- n += 79;
- n++;
- } else n++;
-
- n+=3;
-
- picture->timeinc_resolution = getbits(buffer, n, 8) << 8;
- n += 8;
- picture->timeinc_resolution |= getbits(buffer, n, 8);
- n += 8;
-
- picture->timeinc_bits = 0;
- v = picture->timeinc_resolution - 1;
- while(v && (x<16)) {
- v>>=1;
- picture->timeinc_bits++;
- }
- picture->timeinc_bits = (picture->timeinc_bits > 1 ? picture->timeinc_bits : 1);
-
- n++; //marker bit
-
- if(getbits(buffer, n++, 1)) { //fixed_vop_timeinc
- n += read_timeinc(picture, buffer, n);
-
- if(picture->timeinc_unit)
- picture->fps = (float) picture->timeinc_resolution / (float) picture->timeinc_unit;
- }
-
- n++; //marker bit
- picture->display_picture_width = getbits16(buffer, n, 13);
- n += 13;
- n++; //marker bit
- picture->display_picture_height = getbits16(buffer, n, 13);
- n += 13;
-
- //fprintf(stderr, "ASPECT: %d, PARW=%d, PARH=%d, TIMEINCRESOLUTION: %d, FIXED_TIMEINC: %d (number of bits: %d), FPS: %u\n",
- // aspect, aspectw, aspecth, picture->timeinc_resolution, picture->timeinc_unit, picture->timeinc_bits, picture->fps);
-
- return 0;
-}
-
-void mp4_header_process_vop(mp_mpeg_header_t * picture, unsigned char * buffer)
-{
- int n;
- n = 0;
- picture->picture_type = getbits(buffer, n, 2);
- n += 2;
- while(getbits(buffer, n, 1))
- n++;
- n++;
- getbits(buffer, n, 1);
- n++;
- n += read_timeinc(picture, buffer, n);
-}
-
-#define min(a, b) ((a) <= (b) ? (a) : (b))
-
-static unsigned int read_golomb(unsigned char *buffer, unsigned int *init)
-{
- unsigned int x, v = 0, v2 = 0, m, len = 0, n = *init;
-
- while(getbits(buffer, n++, 1) == 0)
- len++;
-
- x = len + n;
- while(n < x)
- {
- m = min(x - n, 8);
- v |= getbits(buffer, n, m);
- n += m;
- if(x - n > 8)
- v <<= 8;
- }
-
- v2 = 1;
- for(n = 0; n < len; n++)
- v2 <<= 1;
- v2 = (v2 - 1) + v;
-
- //fprintf(stderr, "READ_GOLOMB(%u), V=2^%u + %u-1 = %u\n", *init, len, v, v2);
- *init = x;
- return v2;
-}
-
-inline static int read_golomb_s(unsigned char *buffer, unsigned int *init)
-{
- unsigned int v = read_golomb(buffer, init);
- return (v & 1) ? ((v + 1) >> 1) : -(v >> 1);
-}
-
-static int h264_parse_vui(mp_mpeg_header_t * picture, unsigned char * buf, unsigned int n)
-{
- unsigned int overscan, vsp_color, chroma, timing, fixed_fps;
-
- if(getbits(buf, n++, 1))
- {
- picture->aspect_ratio_information = getbits(buf, n, 8);
- n += 8;
- if(picture->aspect_ratio_information == 255)
- {
- picture->display_picture_width = (getbits(buf, n, 8) << 8) | getbits(buf, n + 8, 8);
- n += 16;
-
- picture->display_picture_height = (getbits(buf, n, 8) << 8) | getbits(buf, n + 8, 8);
- n += 16;
- }
- }
-
- if((overscan=getbits(buf, n++, 1)))
- n++;
- if((vsp_color=getbits(buf, n++, 1)))
- {
- n += 4;
- if(getbits(buf, n++, 1))
- n += 24;
- }
- if((chroma=getbits(buf, n++, 1)))
- {
- read_golomb(buf, &n);
- read_golomb(buf, &n);
- }
- if((timing=getbits(buf, n++, 1)))
- {
- picture->timeinc_unit = (getbits(buf, n, 8) << 24) | (getbits(buf, n+8, 8) << 16) | (getbits(buf, n+16, 8) << 8) | getbits(buf, n+24, 8);
- n += 32;
-
- picture->timeinc_resolution = (getbits(buf, n, 8) << 24) | (getbits(buf, n+8, 8) << 16) | (getbits(buf, n+16, 8) << 8) | getbits(buf, n+24, 8);
- n += 32;
-
- fixed_fps = getbits(buf, n, 1);
-
- if(picture->timeinc_unit > 0 && picture->timeinc_resolution > 0)
- picture->fps = (float) picture->timeinc_resolution / (float) picture->timeinc_unit;
- if(fixed_fps)
- picture->fps /= 2;
- }
-
- //fprintf(stderr, "H264_PARSE_VUI, OVESCAN=%u, VSP_COLOR=%u, CHROMA=%u, TIMING=%u, DISPW=%u, DISPH=%u, TIMERES=%u, TIMEINC=%u, FIXED_FPS=%u\n", overscan, vsp_color, chroma, timing, picture->display_picture_width, picture->display_picture_height,
- // picture->timeinc_resolution, picture->timeinc_unit, picture->timeinc_unit, fixed_fps);
-
- return n;
-}
-
-static int mp_unescape03(unsigned char *buf, int len)
-{
- unsigned char *dest;
- int i, j, skip;
-
- dest = malloc(len);
- if(! dest)
- return 0;
-
- j = i = skip = 0;
- while(i <= len-3)
- {
- if(buf[i] == 0 && buf[i+1] == 0 && buf[i+2] == 3)
- {
- dest[j] = dest[j+1] = 0;
- j += 2;
- i += 3;
- skip++;
- }
- else
- {
- dest[j] = buf[i];
- j++;
- i++;
- }
- }
- dest[j] = buf[len-2];
- dest[j+1] = buf[len-1];
- len -= skip;
- memcpy(buf, dest, len);
- free(dest);
-
- return len;
-}
-
-int h264_parse_sps(mp_mpeg_header_t * picture, unsigned char * buf, int len)
-{
- unsigned int n = 0, v, i, k, mbh;
- int frame_mbs_only;
-
- len = mp_unescape03(buf, len);
-
- picture->fps = picture->timeinc_unit = picture->timeinc_resolution = 0;
- n = 24;
- read_golomb(buf, &n);
- if(buf[0] >= 100){
- if(read_golomb(buf, &n) == 3)
- n++;
- read_golomb(buf, &n);
- read_golomb(buf, &n);
- n++;
- if(getbits(buf, n++, 1)){
- for(i = 0; i < 8; i++)
- { // scaling list is skipped for now
- if(getbits(buf, n++, 1))
- {
- v = 8;
- for(k = (i < 6 ? 16 : 64); k && v; k--)
- v = (v + read_golomb_s(buf, &n)) & 255;
- }
- }
- }
- }
- read_golomb(buf, &n);
- v = read_golomb(buf, &n);
- if(v == 0)
- read_golomb(buf, &n);
- else if(v == 1)
- {
- getbits(buf, n++, 1);
- read_golomb(buf, &n);
- read_golomb(buf, &n);
- v = read_golomb(buf, &n);
- for(i = 0; i < v; i++)
- read_golomb(buf, &n);
- }
- read_golomb(buf, &n);
- getbits(buf, n++, 1);
- picture->display_picture_width = 16 *(read_golomb(buf, &n)+1);
- mbh = read_golomb(buf, &n)+1;
- frame_mbs_only = getbits(buf, n++, 1);
- picture->display_picture_height = 16 * (2 - frame_mbs_only) * mbh;
- if(!frame_mbs_only)
- getbits(buf, n++, 1);
- getbits(buf, n++, 1);
- if(getbits(buf, n++, 1))
- {
- read_golomb(buf, &n);
- read_golomb(buf, &n);
- read_golomb(buf, &n);
- read_golomb(buf, &n);
- }
- if(getbits(buf, n++, 1))
- n = h264_parse_vui(picture, buf, n);
-
- return n;
-}
-
-int mp_vc1_decode_sequence_header(mp_mpeg_header_t * picture, unsigned char * buf, int len)
-{
- int n, x;
-
- len = mp_unescape03(buf, len);
-
- picture->display_picture_width = picture->display_picture_height = 0;
- picture->fps = 0;
- n = 0;
- x = getbits(buf, n, 2);
- n += 2;
- if(x != 3) //not advanced profile
- return 0;
-
- getbits16(buf, n, 14);
- n += 14;
- picture->display_picture_width = getbits16(buf, n, 12) * 2 + 2;
- n += 12;
- picture->display_picture_height = getbits16(buf, n, 12) * 2 + 2;
- n += 12;
- getbits(buf, n, 6);
- n += 6;
- x = getbits(buf, n, 1);
- n += 1;
- if(x) //display info
- {
- getbits16(buf, n, 14);
- n += 14;
- getbits16(buf, n, 14);
- n += 14;
- if(getbits(buf, n++, 1)) //aspect ratio
- {
- x = getbits(buf, n, 4);
- n += 4;
- if(x == 15)
- {
- getbits16(buf, n, 16);
- n += 16;
- }
- }
-
- if(getbits(buf, n++, 1)) //framerates
- {
- int frexp=0, frnum=0, frden=0;
-
- if(getbits(buf, n++, 1))
- {
- frexp = getbits16(buf, n, 16);
- n += 16;
- picture->fps = (double) (frexp+1) / 32.0;
- }
- else
- {
- float frates[] = {0, 24000, 25000, 30000, 50000, 60000, 48000, 72000, 0};
- float frdivs[] = {0, 1000, 1001, 0};
-
- frnum = getbits(buf, n, 8);
- n += 8;
- frden = getbits(buf, n, 4);
- n += 4;
- if((frden == 1 || frden == 2) && (frnum < 8))
- picture->fps = frates[frnum] / frdivs[frden];
- }
- }
- }
-
- //free(dest);
- return 1;
-}
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