247 lines
6.5 KiB
C
247 lines
6.5 KiB
C
/*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <string.h>
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#include "tvheadend.h"
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#include "dvr.h"
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/**
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* Replaces the extension of a filename with a different extension.
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* filename, in: full path to file.
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* new_ext, in: new extension including leading '.'., e.g. ".edl"
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* new_filename, in: pre-allocated char*, out: filename with the new extension.
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* Return 1 on success, otherwise 0.
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**/
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static int
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dvr_switch_file_extension(const char *filename, const char *new_ext, char *new_filename)
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{
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char *ext = strrchr(filename, '.');
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// No '.' found. Probably not a good path/file then...
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if(ext == NULL) {
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return 0;
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}
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int len = (ext - filename);
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if(len <= 0) {
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return 0;
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}
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// Allocate length for stripped filename + new_ext + "\0"
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int ext_len = strlen(new_ext);
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// Build the new filename.
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memcpy(new_filename, filename, len);
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memcpy(&new_filename[len], new_ext, ext_len);
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new_filename[len + ext_len] = 0;
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return 1;
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}
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/**
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* Parse EDL data.
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* filename, in: full path to EDL file.
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* cut_list, in: empty list. out: the list filled with data.
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* Don't forget to call dvr_cutpoint_list_destroy for the cut_list when done.
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* return: number of read valid lines.
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*
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* Example of EDL file content:
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*
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* 2.00 98.36 3
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* 596.92 665.92 3
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* 1426.68 2160.16 3
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*
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**/
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static int
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dvr_parse_edl(const char *filename, dvr_cutpoint_list_t *cut_list)
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{
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char line[DVR_MAX_CUTPOINT_LINE];
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int line_count = 0, valid_lines = 0, action = 0;
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float start = 0.0f, end = 0.0f;
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dvr_cutpoint_t *cutpoint;
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FILE *file = fopen(filename, "r");
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// No file found. Which is perfectly ok.
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if (file == NULL)
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return -1;
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while(line_count < DVR_MAX_READ_CUTFILE_LINES) {
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if(fgets(line, DVR_MAX_CUTPOINT_LINE, file) == NULL)
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break;
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line_count++;
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if (sscanf(line, "%f\t%f\t%d", &start, &end, &action) == 3) {
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// Sanity checks...
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if(start < 0 || end < 0 || end < start || start == end ||
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action < DVR_CP_CUT || action > DVR_CP_COMM) {
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tvhwarn("DVR",
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"Insane entry: start=%f, end=%f. Skipping.", start, end);
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continue;
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}
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cutpoint = calloc(1, sizeof(dvr_cutpoint_t));
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if(cutpoint == NULL) {
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fclose(file);
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return 0;
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}
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cutpoint->dc_start_ms = (int) (start * 1000.0f);
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cutpoint->dc_end_ms = (int) (end * 1000.0f);
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cutpoint->dc_type = action;
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TAILQ_INSERT_TAIL(cut_list, cutpoint, dc_link);
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valid_lines++;
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if(valid_lines >= DVR_MAX_CUT_ENTRIES)
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break;
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}
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}
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fclose(file);
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return valid_lines;
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}
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/**
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* Parse comskip data.
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* filename, in: full path to comskip file.
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* cut_list, in: empty list. out: the list filled with data.
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* Don't forget to call dvr_cutpoint_list_destroy for the cut_list when done.
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* return: number of read valid lines.
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*
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* Example of comskip file content (format v2):
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*
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* FILE PROCESSING COMPLETE 53999 FRAMES AT 2500
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* -------------------
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* 50 2459
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* 14923 23398
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* 42417 54004
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*
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**/
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static int
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dvr_parse_comskip(const char *filename, dvr_cutpoint_list_t *cut_list)
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{
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char line[DVR_MAX_CUTPOINT_LINE];
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float frame_rate = 0.0f;
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int line_count = 0, valid_lines = 0, start = 0, end = 0;
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dvr_cutpoint_t *cutpoint;
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FILE *file = fopen(filename, "r");
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// No file found. Which is perfectly ok.
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if (file == NULL)
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return -1;
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while(line_count < DVR_MAX_READ_CUTFILE_LINES) {
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if(fgets(line, DVR_MAX_CUTPOINT_LINE, file) == NULL)
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break;
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line_count++;
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if (sscanf(line, "FILE PROCESSING COMPLETE %*d FRAMES AT %f", &frame_rate) == 1)
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continue;
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if(frame_rate > 0.0f && sscanf(line, "%d\t%d", &start, &end) == 2) {
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// Sanity checks...
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if(start < 0 || end < 0 || end < start || start == end) {
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tvherror("DVR",
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"Insane EDL entry: start=%d, end=%d. Skipping.", start, end);
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continue;
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}
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// Support frame rate stated as both 25 and 2500
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frame_rate /= (frame_rate > 1000.0f ? 100.0f : 1.0f);
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cutpoint = calloc(1, sizeof(dvr_cutpoint_t));
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if(cutpoint == NULL) {
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fclose(file);
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return 0;
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}
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// Convert frame numbers to timestamps (in ms)
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cutpoint->dc_start_ms = (int) ((start * 1000) / frame_rate);
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cutpoint->dc_end_ms = (int) ((end * 1000) / frame_rate);
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// Comskip don't have different actions, so use DVR_CP_COMM (Commercial skip)
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cutpoint->dc_type = DVR_CP_COMM;
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TAILQ_INSERT_TAIL(cut_list, cutpoint, dc_link);
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valid_lines++;
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if(valid_lines >= DVR_MAX_CUT_ENTRIES)
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break;
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}
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}
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fclose(file);
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return valid_lines;
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}
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/**
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* Return cutpoint data for a recording (if present).
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**/
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dvr_cutpoint_list_t *
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dvr_get_cutpoint_list (uint32_t dvr_entry_id)
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{
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dvr_entry_t *de;
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if ((de = dvr_entry_find_by_id(dvr_entry_id)) == NULL)
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return NULL;
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if (de->de_filename == NULL)
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return NULL;
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char *dc_filename = alloca(strlen(de->de_filename) + 4);
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if(dc_filename == NULL)
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return NULL;
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// First we try with comskip file. (.txt)
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if(!dvr_switch_file_extension(de->de_filename, ".txt", dc_filename))
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return NULL;
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dvr_cutpoint_list_t *cuts = calloc(1, sizeof(dvr_cutpoint_list_t));
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if (cuts == NULL)
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return NULL;
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TAILQ_INIT(cuts);
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if(dvr_parse_comskip(dc_filename, cuts) == -1) {
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// Then try with edl file. (.edl)
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if(!dvr_switch_file_extension(de->de_filename, ".edl", dc_filename)) {
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dvr_cutpoint_list_destroy(cuts);
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return NULL;
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}
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if(dvr_parse_edl(dc_filename, cuts) == -1) {
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// No cutpoint file found
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dvr_cutpoint_list_destroy(cuts);
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return NULL;
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}
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}
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return cuts;
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}
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/***************************
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* Helpers
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***************************/
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void
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dvr_cutpoint_list_destroy (dvr_cutpoint_list_t *list)
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{
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if(!list) return;
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dvr_cutpoint_t *cp;
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while ((cp = TAILQ_FIRST(list))) {
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TAILQ_REMOVE(list, cp, dc_link);
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free(cp);
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}
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free(list);
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}
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