diff options
Diffstat (limited to 'media/libaom/src/aom_dsp/grain_table.c')
| -rw-r--r-- | media/libaom/src/aom_dsp/grain_table.c | 333 |
1 files changed, 333 insertions, 0 deletions
diff --git a/media/libaom/src/aom_dsp/grain_table.c b/media/libaom/src/aom_dsp/grain_table.c new file mode 100644 index 000000000..0d6a73f55 --- /dev/null +++ b/media/libaom/src/aom_dsp/grain_table.c @@ -0,0 +1,333 @@ +/* + * Copyright (c) 2016, Alliance for Open Media. All rights reserved + * + * This source code is subject to the terms of the BSD 2 Clause License and + * the Alliance for Open Media Patent License 1.0. If the BSD 2 Clause License + * was not distributed with this source code in the LICENSE file, you can + * obtain it at www.aomedia.org/license/software. If the Alliance for Open + * Media Patent License 1.0 was not distributed with this source code in the + * PATENTS file, you can obtain it at www.aomedia.org/license/patent. + */ + +/*!\file + * \brief This file has the implementation details of the grain table. + * + * The file format is an ascii representation for readability and + * editability. Array parameters are separated from the non-array + * parameters and prefixed with a few characters to make for easy + * localization with a parameter set. Each entry is prefixed with "E" + * and the other parameters are only specified if "update-parms" is + * non-zero. + * + * filmgrn1 + * E <start-time> <end-time> <apply-grain> <random-seed> <update-parms> + * p <ar_coeff_lag> <ar_coeff_shift> <grain_scale_shift> ... + * sY <num_y_points> <point_0_x> <point_0_y> ... + * sCb <num_cb_points> <point_0_x> <point_0_y> ... + * sCr <num_cr_points> <point_0_x> <point_0_y> ... + * cY <ar_coeff_y_0> .... + * cCb <ar_coeff_cb_0> .... + * cCr <ar_coeff_cr_0> .... + * E <start-time> ... + */ +#include <string.h> +#include <stdio.h> +#include "aom_dsp/aom_dsp_common.h" +#include "aom_dsp/grain_table.h" +#include "aom_mem/aom_mem.h" + +static const char kFileMagic[8] = "filmgrn1"; + +static void grain_table_entry_read(FILE *file, + struct aom_internal_error_info *error_info, + aom_film_grain_table_entry_t *entry) { + aom_film_grain_t *pars = &entry->params; + int num_read = + fscanf(file, "E %" PRId64 " %" PRId64 " %d %hd %d\n", &entry->start_time, + &entry->end_time, &pars->apply_grain, &pars->random_seed, + &pars->update_parameters); + if (num_read == 0 && feof(file)) return; + if (num_read != 5) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to read entry header. Read %d != 5", num_read); + return; + } + if (pars->update_parameters) { + num_read = fscanf(file, "p %d %d %d %d %d %d %d %d %d %d %d %d\n", + &pars->ar_coeff_lag, &pars->ar_coeff_shift, + &pars->grain_scale_shift, &pars->scaling_shift, + &pars->chroma_scaling_from_luma, &pars->overlap_flag, + &pars->cb_mult, &pars->cb_luma_mult, &pars->cb_offset, + &pars->cr_mult, &pars->cr_luma_mult, &pars->cr_offset); + if (num_read != 12) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to read entry params. Read %d != 12", + num_read); + return; + } + if (!fscanf(file, "\tsY %d ", &pars->num_y_points)) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to read num y points"); + return; + } + for (int i = 0; i < pars->num_y_points; ++i) { + if (2 != fscanf(file, "%d %d", &pars->scaling_points_y[i][0], + &pars->scaling_points_y[i][1])) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to read y scaling points"); + return; + } + } + if (!fscanf(file, "\n\tsCb %d", &pars->num_cb_points)) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to read num cb points"); + return; + } + for (int i = 0; i < pars->num_cb_points; ++i) { + if (2 != fscanf(file, "%d %d", &pars->scaling_points_cb[i][0], + &pars->scaling_points_cb[i][1])) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to read cb scaling points"); + return; + } + } + if (!fscanf(file, "\n\tsCr %d", &pars->num_cr_points)) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to read num cr points"); + return; + } + for (int i = 0; i < pars->num_cr_points; ++i) { + if (2 != fscanf(file, "%d %d", &pars->scaling_points_cr[i][0], + &pars->scaling_points_cr[i][1])) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to read cr scaling points"); + return; + } + } + + fscanf(file, "\n\tcY"); + const int n = 2 * pars->ar_coeff_lag * (pars->ar_coeff_lag + 1); + for (int i = 0; i < n; ++i) { + if (1 != fscanf(file, "%d", &pars->ar_coeffs_y[i])) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to read Y coeffs"); + return; + } + } + fscanf(file, "\n\tcCb"); + for (int i = 0; i <= n; ++i) { + if (1 != fscanf(file, "%d", &pars->ar_coeffs_cb[i])) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to read Cb coeffs"); + return; + } + } + fscanf(file, "\n\tcCr"); + for (int i = 0; i <= n; ++i) { + if (1 != fscanf(file, "%d", &pars->ar_coeffs_cr[i])) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to read Cr coeffs"); + return; + } + } + fscanf(file, "\n"); + } +} + +void grain_table_entry_write(FILE *file, aom_film_grain_table_entry_t *entry) { + const aom_film_grain_t *pars = &entry->params; + fprintf(file, "E %" PRId64 " %" PRId64 " %d %d %d\n", entry->start_time, + entry->end_time, pars->apply_grain, pars->random_seed, + pars->update_parameters); + if (pars->update_parameters) { + fprintf(file, "\tp %d %d %d %d %d %d %d %d %d %d %d %d\n", + pars->ar_coeff_lag, pars->ar_coeff_shift, pars->grain_scale_shift, + pars->scaling_shift, pars->chroma_scaling_from_luma, + pars->overlap_flag, pars->cb_mult, pars->cb_luma_mult, + pars->cb_offset, pars->cr_mult, pars->cr_luma_mult, + pars->cr_offset); + fprintf(file, "\tsY %d ", pars->num_y_points); + for (int i = 0; i < pars->num_y_points; ++i) { + fprintf(file, " %d %d", pars->scaling_points_y[i][0], + pars->scaling_points_y[i][1]); + } + fprintf(file, "\n\tsCb %d", pars->num_cb_points); + for (int i = 0; i < pars->num_cb_points; ++i) { + fprintf(file, " %d %d", pars->scaling_points_cb[i][0], + pars->scaling_points_cb[i][1]); + } + fprintf(file, "\n\tsCr %d", pars->num_cr_points); + for (int i = 0; i < pars->num_cr_points; ++i) { + fprintf(file, " %d %d", pars->scaling_points_cr[i][0], + pars->scaling_points_cr[i][1]); + } + fprintf(file, "\n\tcY"); + const int n = 2 * pars->ar_coeff_lag * (pars->ar_coeff_lag + 1); + for (int i = 0; i < n; ++i) { + fprintf(file, " %d", pars->ar_coeffs_y[i]); + } + fprintf(file, "\n\tcCb"); + for (int i = 0; i <= n; ++i) { + fprintf(file, " %d", pars->ar_coeffs_cb[i]); + } + fprintf(file, "\n\tcCr"); + for (int i = 0; i <= n; ++i) { + fprintf(file, " %d", pars->ar_coeffs_cr[i]); + } + fprintf(file, "\n"); + } +} + +void aom_film_grain_table_append(aom_film_grain_table_t *t, int64_t time_stamp, + int64_t end_time, + const aom_film_grain_t *grain) { + if (!t->tail || memcmp(grain, &t->tail->params, sizeof(*grain))) { + aom_film_grain_table_entry_t *new_tail = aom_malloc(sizeof(*new_tail)); + memset(new_tail, 0, sizeof(*new_tail)); + if (t->tail) t->tail->next = new_tail; + if (!t->head) t->head = new_tail; + t->tail = new_tail; + + new_tail->start_time = time_stamp; + new_tail->end_time = end_time; + new_tail->params = *grain; + } else { + t->tail->end_time = AOMMAX(t->tail->end_time, end_time); + t->tail->start_time = AOMMIN(t->tail->start_time, time_stamp); + } +} + +int aom_film_grain_table_lookup(aom_film_grain_table_t *t, int64_t time_stamp, + int64_t end_time, int erase, + aom_film_grain_t *grain) { + aom_film_grain_table_entry_t *entry = t->head; + aom_film_grain_table_entry_t *prev_entry = 0; + int16_t random_seed = grain ? grain->random_seed : 0; + if (grain) memset(grain, 0, sizeof(*grain)); + + while (entry) { + aom_film_grain_table_entry_t *next = entry->next; + if (time_stamp >= entry->start_time && time_stamp < entry->end_time) { + if (grain) { + *grain = entry->params; + if (time_stamp != 0) grain->random_seed = random_seed; + } + if (!erase) return 1; + + const int64_t entry_end_time = entry->end_time; + if (time_stamp <= entry->start_time && end_time >= entry->end_time) { + if (t->tail == entry) t->tail = prev_entry; + if (prev_entry) { + prev_entry->next = entry->next; + } else { + t->head = entry->next; + } + aom_free(entry); + } else if (time_stamp <= entry->start_time && + end_time < entry->end_time) { + entry->start_time = end_time; + } else if (time_stamp > entry->start_time && + end_time >= entry->end_time) { + entry->end_time = time_stamp; + } else { + aom_film_grain_table_entry_t *new_entry = + aom_malloc(sizeof(*new_entry)); + new_entry->next = entry->next; + new_entry->start_time = end_time; + new_entry->end_time = entry->end_time; + new_entry->params = entry->params; + entry->next = new_entry; + entry->end_time = time_stamp; + if (t->tail == entry) t->tail = new_entry; + } + // If segments aren't aligned, delete from the beggining of subsequent + // segments + if (end_time > entry_end_time) { + aom_film_grain_table_lookup(t, entry->end_time, end_time, 1, 0); + } + return 1; + } + prev_entry = entry; + entry = next; + } + return 0; +} + +aom_codec_err_t aom_film_grain_table_read( + aom_film_grain_table_t *t, const char *filename, + struct aom_internal_error_info *error_info) { + FILE *file = fopen(filename, "rb"); + if (!file) { + aom_internal_error(error_info, AOM_CODEC_ERROR, "Unable to open %s", + filename); + return error_info->error_code; + } + error_info->error_code = AOM_CODEC_OK; + + // Read in one extra character as there should be white space after + // the header. + char magic[9]; + if (!fread(magic, 9, 1, file) || memcmp(magic, kFileMagic, 8)) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to read (or invalid) file magic"); + fclose(file); + return error_info->error_code; + } + + aom_film_grain_table_entry_t *prev_entry = 0; + while (!feof(file)) { + aom_film_grain_table_entry_t *entry = aom_malloc(sizeof(*entry)); + memset(entry, 0, sizeof(*entry)); + grain_table_entry_read(file, error_info, entry); + entry->next = 0; + + if (prev_entry) prev_entry->next = entry; + if (!t->head) t->head = entry; + t->tail = entry; + prev_entry = entry; + + if (error_info->error_code != AOM_CODEC_OK) break; + } + + fclose(file); + return error_info->error_code; +} + +aom_codec_err_t aom_film_grain_table_write( + const aom_film_grain_table_t *t, const char *filename, + struct aom_internal_error_info *error_info) { + error_info->error_code = AOM_CODEC_OK; + + FILE *file = fopen(filename, "wb"); + if (!file) { + aom_internal_error(error_info, AOM_CODEC_ERROR, "Unable to open file %s", + filename); + return error_info->error_code; + } + + if (!fwrite(kFileMagic, 8, 1, file)) { + aom_internal_error(error_info, AOM_CODEC_ERROR, + "Unable to write file magic"); + fclose(file); + return error_info->error_code; + } + + fprintf(file, "\n"); + aom_film_grain_table_entry_t *entry = t->head; + while (entry) { + grain_table_entry_write(file, entry); + entry = entry->next; + } + fclose(file); + return error_info->error_code; +} + +void aom_film_grain_table_free(aom_film_grain_table_t *t) { + aom_film_grain_table_entry_t *entry = t->head; + while (entry) { + aom_film_grain_table_entry_t *next = entry->next; + aom_free(entry); + entry = next; + } + memset(t, 0, sizeof(*t)); +} |