diff options
Diffstat (limited to 'demux/mpeg_hdr.c')
-rw-r--r-- | demux/mpeg_hdr.c | 539 |
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; -} |