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-rw-r--r--src/libmpeg2/header.c419
1 files changed, 0 insertions, 419 deletions
diff --git a/src/libmpeg2/header.c b/src/libmpeg2/header.c
deleted file mode 100644
index c0df02c7f..000000000
--- a/src/libmpeg2/header.c
+++ /dev/null
@@ -1,419 +0,0 @@
-/*
- * header.c
- * Copyright (C) 2000-2002 Michel Lespinasse <walken@zoy.org>
- * Copyright (C) 1999-2000 Aaron Holtzman <aholtzma@ess.engr.uvic.ca>
- *
- * This file is part of mpeg2dec, a free MPEG-2 video stream decoder.
- * See http://libmpeg2.sourceforge.net/ for updates.
- *
- * mpeg2dec 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.
- *
- * mpeg2dec 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 this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-/*
-#define LOG_PAN_SCAN
-*/
-
-#include "config.h"
-
-#include <stdio.h> /* For printf debugging */
-#include <inttypes.h>
-
-#include "mpeg2_internal.h"
-#include "attributes.h"
-
-/* default intra quant matrix, in zig-zag order */
-static const uint8_t default_intra_quantizer_matrix[64] ATTR_ALIGN(16) = {
- 8,
- 16, 16,
- 19, 16, 19,
- 22, 22, 22, 22,
- 22, 22, 26, 24, 26,
- 27, 27, 27, 26, 26, 26,
- 26, 27, 27, 27, 29, 29, 29,
- 34, 34, 34, 29, 29, 29, 27, 27,
- 29, 29, 32, 32, 34, 34, 37,
- 38, 37, 35, 35, 34, 35,
- 38, 38, 40, 40, 40,
- 48, 48, 46, 46,
- 56, 56, 58,
- 69, 69,
- 83
-};
-
-uint8_t mpeg2_scan_norm[64] ATTR_ALIGN(16) =
-{
- /* Zig-Zag scan pattern */
- 0, 1, 8,16, 9, 2, 3,10,
- 17,24,32,25,18,11, 4, 5,
- 12,19,26,33,40,48,41,34,
- 27,20,13, 6, 7,14,21,28,
- 35,42,49,56,57,50,43,36,
- 29,22,15,23,30,37,44,51,
- 58,59,52,45,38,31,39,46,
- 53,60,61,54,47,55,62,63
-};
-
-uint8_t mpeg2_scan_alt[64] ATTR_ALIGN(16) =
-{
- /* Alternate scan pattern */
- 0,8,16,24,1,9,2,10,17,25,32,40,48,56,57,49,
- 41,33,26,18,3,11,4,12,19,27,34,42,50,58,35,43,
- 51,59,20,28,5,13,6,14,21,29,36,44,52,60,37,45,
- 53,61,22,30,7,15,23,31,38,46,54,62,39,47,55,63
-};
-
-/* count must be between 1 and 32 */
-static uint32_t get_bits(uint8_t *buffer, uint32_t count, uint32_t *bit_position) {
- uint32_t byte_offset;
- uint32_t bit_offset;
- uint32_t bit_mask;
- uint32_t bit_bite;
- uint32_t result=0;
- if (count == 0) return 0;
- do {
- byte_offset = *bit_position >> 3; /* Div 8 */
- bit_offset = 8 - (*bit_position & 0x7); /* Bits got 87654321 */
- bit_mask = ((1 << (bit_offset)) - 1);
- bit_bite = bit_offset;
- if (count < bit_offset) {
- bit_mask ^= ((1 << (bit_offset-count)) - 1);
- bit_bite = count;
- }
- /*
- printf("Byte=0x%02x Bitmask=0x%04x byte_offset=%u bit_offset=%u bit_byte=%u count=%u\n",buffer[byte_offset], bit_mask, byte_offset, bit_offset, bit_bite,count);
- */
- result = (result << bit_bite) | ((buffer[byte_offset] & bit_mask) >> (bit_offset-bit_bite));
- *bit_position+=bit_bite;
- count-=bit_bite;
- } while ((count > 0) && (byte_offset<50) );
- return result;
-}
-
-static int32_t get_bits_signed(uint8_t *buffer, uint32_t count, uint32_t *bit_position) {
- uint32_t value = get_bits(buffer, count, bit_position);
- uint32_t sign_mask = (uint32_t)(-1 << (count - 1));
- if (value & sign_mask)
- value |= sign_mask; /* sign-extend value */
- return (int32_t)value;
-}
-
-void mpeg2_header_state_init (picture_t * picture)
-{
- picture->scan = mpeg2_scan_norm;
- picture->load_intra_quantizer_matrix = 1;
- picture->load_non_intra_quantizer_matrix = 1;
-}
-
-int mpeg2_header_sequence (picture_t * picture, uint8_t * buffer)
-{
- int width, height;
- int i;
-
- if ((buffer[6] & 0x20) != 0x20)
- return 1; /* missing marker_bit */
-
- height = (buffer[0] << 16) | (buffer[1] << 8) | buffer[2];
-
- picture->display_width = width = (height >> 12);
- picture->display_height = height = (height & 0xfff);
-
- width = (width + 15) & ~15;
- height = (height + 15) & ~15;
-
- if ((width > 1920) || (height > 1152))
- return 1; /* size restrictions for MP@HL */
-
- picture->coded_picture_width = width;
- picture->coded_picture_height = height;
-
- /* this is not used by the decoder */
- picture->aspect_ratio_information = buffer[3] >> 4;
- picture->frame_rate_code = buffer[3] & 15;
- picture->bitrate = (buffer[4]<<10)|(buffer[5]<<2)|(buffer[6]>>6);
-
- if (buffer[7] & 2) {
- for (i = 0; i < 64; i++)
- picture->intra_quantizer_matrix[mpeg2_scan_norm[i]] =
- (buffer[i+7] << 7) | (buffer[i+8] >> 1);
- buffer += 64;
- } else
- for (i = 0; i < 64; i++)
- picture->intra_quantizer_matrix[mpeg2_scan_norm[i]] =
- default_intra_quantizer_matrix [i];
-
- if (buffer[7] & 1)
- for (i = 0; i < 64; i++)
- picture->non_intra_quantizer_matrix[mpeg2_scan_norm[i]] =
- buffer[i+8];
- else
- for (i = 0; i < 64; i++)
- picture->non_intra_quantizer_matrix[i] = 16;
- picture->load_intra_quantizer_matrix = 1;
- picture->load_non_intra_quantizer_matrix = 1;
- /* MPEG1 - for testing only */
- picture->mpeg1 = 1;
- picture->intra_dc_precision = 0;
- picture->frame_pred_frame_dct = 1;
- picture->q_scale_type = 0;
- picture->concealment_motion_vectors = 0;
- /* picture->alternate_scan = 0; */
- picture->picture_structure = FRAME_PICTURE;
- /* picture->second_field = 0; */
-
- return 0;
-}
-
-static int sequence_extension (picture_t * picture, uint8_t * buffer)
-{
- /* check chroma format, size extensions, marker bit */
- if (((buffer[1] & 0x07) != 0x02) || (buffer[2] & 0xe0) ||
- ((buffer[3] & 0x01) != 0x01))
- return 1;
-
- /* this is not used by the decoder */
- picture->progressive_sequence = (buffer[1] >> 3) & 1;
-
- picture->low_delay = buffer[5] & 0x80;
-
- if (!picture->progressive_sequence)
- picture->coded_picture_height =
- (picture->coded_picture_height + 31) & ~31;
-
-
- /* printf ("libmpeg2: low_delay : %d\n", picture->low_delay); */
-
-/*
- printf ("libmpeg2: sequence extension+5 : %08x (%d)\n",
- buffer[5], buffer[5] % 0x80);
- */
-
- picture->frame_rate_ext_n = buffer[5] & 0x31;
- picture->frame_rate_ext_d = (buffer[5] >> 2) & 0x03;
-
- /* MPEG1 - for testing only */
- picture->mpeg1 = 0;
-
- return 0;
-}
-
-static int quant_matrix_extension (picture_t * picture, uint8_t * buffer)
-{
- int i;
-
- if (buffer[0] & 8) {
- for (i = 0; i < 64; i++)
- picture->intra_quantizer_matrix[mpeg2_scan_norm[i]] =
- (buffer[i] << 5) | (buffer[i+1] >> 3);
- buffer += 64;
- }
-
- if (buffer[0] & 4)
- for (i = 0; i < 64; i++)
- picture->non_intra_quantizer_matrix[mpeg2_scan_norm[i]] =
- (buffer[i] << 6) | (buffer[i+1] >> 2);
-
- return 0;
-}
-
-static int picture_coding_extension (picture_t * picture, uint8_t * buffer)
-{
- /* pre subtract 1 for use later in compute_motion_vector */
- picture->f_motion.f_code[0] = (buffer[0] & 15) - 1;
- picture->f_motion.f_code[1] = (buffer[1] >> 4) - 1;
- picture->b_motion.f_code[0] = (buffer[1] & 15) - 1;
- picture->b_motion.f_code[1] = (buffer[2] >> 4) - 1;
-
- picture->intra_dc_precision = (buffer[2] >> 2) & 3;
- picture->picture_structure = buffer[2] & 3;
- picture->frame_pred_frame_dct = (buffer[3] >> 6) & 1;
- picture->concealment_motion_vectors = (buffer[3] >> 5) & 1;
- picture->q_scale_type = (buffer[3] >> 4) & 1;
- picture->intra_vlc_format = (buffer[3] >> 3) & 1;
-
- if (buffer[3] & 4) /* alternate_scan */
- picture->scan = mpeg2_scan_alt;
- else
- picture->scan = mpeg2_scan_norm;
-
- /* these are not used by the decoder */
- picture->top_field_first = buffer[3] >> 7;
- picture->repeat_first_field = (buffer[3] >> 1) & 1;
- picture->progressive_frame = buffer[4] >> 7;
-
- return 0;
-}
-
-static int sequence_display_extension (picture_t * picture, uint8_t * buffer) {
- /* FIXME: implement. */
- uint32_t bit_position;
- uint32_t padding;
-
- bit_position = 0;
- padding = get_bits(buffer, 4, &bit_position);
- picture->video_format = get_bits(buffer, 3, &bit_position);
- picture->colour_description = get_bits(buffer, 1, &bit_position);
- if(picture->colour_description) {
- picture->colour_primatives = get_bits(buffer, 8, &bit_position);
- picture->transfer_characteristics = get_bits(buffer, 8, &bit_position);
- picture->matrix_coefficients = get_bits(buffer, 8, &bit_position);
- }
- picture->display_horizontal_size = get_bits(buffer, 14, &bit_position);
- padding = get_bits(buffer, 1, &bit_position);
- picture->display_vertical_size = get_bits(buffer, 14, &bit_position);
-
-#ifdef LOG_PAN_SCAN
- printf("Sequence_display_extension\n");
- printf(" video_format: %u\n", picture->video_format);
- printf(" colour_description: %u\n", picture->colour_description);
- if(picture->colour_description) {
- printf(" colour_primatives: %u\n", picture->colour_primatives);
- printf(" transfer_characteristics %u\n", picture->transfer_characteristics);
- printf(" matrix_coefficients %u\n", picture->matrix_coefficients);
- }
- printf(" display_horizontal_size %u\n", picture->display_horizontal_size);
- printf(" display_vertical_size %u\n", picture->display_vertical_size);
-#endif
-
- return 0;
-}
-
-static int picture_display_extension (picture_t * picture, uint8_t * buffer) {
- uint32_t bit_position;
- uint32_t padding;
-
-#ifdef LOG_PAN_SCAN
- printf ("libmpeg2: picture_display_extension\n");
-#endif
-
- bit_position = 0;
- padding = get_bits(buffer, 4, &bit_position);
- picture->frame_centre_horizontal_offset = get_bits_signed(buffer, 16, &bit_position);
- padding = get_bits(buffer, 1, &bit_position);
- picture->frame_centre_vertical_offset = get_bits_signed(buffer, 16, &bit_position);
- padding = get_bits(buffer, 1, &bit_position);
-
-#ifdef LOG_PAN_SCAN
- printf("Pan & Scan centre (x,y) = (%d, %d)\n",
- picture->frame_centre_horizontal_offset,
- picture->frame_centre_vertical_offset);
-#endif
-
- return 0;
-}
-
-int mpeg2_header_extension (picture_t * picture, uint8_t * buffer)
-{
- switch (buffer[0] & 0xf0) {
- case 0x00: /* reserved */
- return 0;
-
- case 0x10: /* sequence extension */
- return sequence_extension (picture, buffer);
-
- case 0x20: /* sequence display extension for Pan & Scan */
- return sequence_display_extension (picture, buffer);
-
- case 0x30: /* quant matrix extension */
- return quant_matrix_extension (picture, buffer);
-
- case 0x40: /* copyright extension */
- return 0;
-
- case 0x50: /* sequence scalable extension */
- return 0;
-
- case 0x60: /* reserved */
- return 0;
-
- case 0x70: /* picture display extension for Pan & Scan */
- return picture_display_extension (picture, buffer);
-
- case 0x80: /* picture coding extension */
- return picture_coding_extension (picture, buffer);
-
- case 0x90: /* picture spacial scalable extension */
- return 0;
-
- case 0xA0: /* picture temporal scalable extension */
- return 0;
-
- case 0xB0: /* camera parameters extension */
- return 0;
-
- case 0xC0: /* ITU-T extension */
- return 0;
-
- case 0xD0: /* reserved */
- return 0;
-
- case 0xE0: /* reserved */
- return 0;
-
- case 0xF0: /* reserved */
- return 0;
- }
-
- return 0;
-}
-
-int mpeg2_header_group_of_pictures (picture_t * picture, uint8_t * buffer) {
- uint32_t bit_position;
- uint32_t padding;
- bit_position = 0;
-
- picture->drop_frame_flag = get_bits(buffer, 1, &bit_position);
- picture->time_code_hours = get_bits(buffer, 5, &bit_position);
- picture->time_code_minutes = get_bits(buffer, 6, &bit_position);
- padding = get_bits(buffer, 1, &bit_position);
- picture->time_code_seconds = get_bits(buffer, 6, &bit_position);
- picture->time_code_pictures = get_bits(buffer, 6, &bit_position);
- picture->closed_gop = get_bits(buffer, 1, &bit_position);
- picture->broken_link = get_bits(buffer, 1, &bit_position);
-
-#ifdef LOG_PAN_SCAN
- printf("Group of pictures\n");
- printf(" drop_frame_flag: %u\n", picture->drop_frame_flag);
- printf(" time_code: HH:MM:SS:Pictures %02u:%02u:%02u:%02u\n",
- picture->time_code_hours,
- picture->time_code_minutes,
- picture->time_code_seconds,
- picture->time_code_pictures);
- printf(" closed_gop: %u\n", picture->closed_gop);
- printf(" bloken_link: %u\n", picture->broken_link);
-#endif
-
- return 0;
-}
-
-int mpeg2_header_picture (picture_t * picture, uint8_t * buffer)
-{
- picture->picture_coding_type = (buffer [1] >> 3) & 7;
- picture->vbv_delay = ((buffer[1] << 13) | (buffer[2] << 5) |
- (buffer[3] >> 3)) & 0xffff;
-
- /* forward_f_code and backward_f_code - used in mpeg1 only */
- picture->f_motion.f_code[1] = (buffer[3] >> 2) & 1;
- picture->f_motion.f_code[0] =
- (((buffer[3] << 1) | (buffer[4] >> 7)) & 7) - 1;
- picture->b_motion.f_code[1] = (buffer[4] >> 6) & 1;
- picture->b_motion.f_code[0] = ((buffer[4] >> 3) & 7) - 1;
-
- /* move in header_process_picture_header */
- picture->second_field =
- (picture->picture_structure != FRAME_PICTURE) &&
- !(picture->second_field);
-
- return 0;
-}
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